Substitution

solve equations by substitution:

x+y= 11
y=5x-25

Correct result:

x =  6
y =  5

Solution:


x+y= 11
y=5x-25

x+y= 11
y=5•x-25

x+y = 11
5x-y = 25

x = 6
y = 5

Our linear equations calculator calculates it.



We would be pleased if you find an error in the word problem or inaccuracies and send it to us. Thank you!



Showing 0 comments:
avatar




Tips to related online calculators
Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions:

  • Two equations
    children_23 Solve equations (use adding and subtracting of linear equations): -4x+11y=5 6x-11y=-5
  • Simple equations
    enc2 Solve system of equations: 5x+3y=5 5x+7y=25
  • Equations
    p1110617 Solve following system of equations: 6(x+7)+4(y-5)=12 2(x+y)-3(-2x+4y)=-44
  • Linear system
    linear_eq_2 Solve a set of two equations of two unknowns: 1.5x+1.2y=0.6 0.8x-0.2y=2
  • Linear system
    vahy_eq Solve this linear system (two linear equations with two unknowns): x+y =36 19x+22y=720
  • Equations - simple
    linearna_1 Solve system of linear equations: x-2y=6 3x+2y=4
  • Simple equation 9
    eq2 Solve the following equation: -8y+5=-9y+9
  • Algebra
    parabol_3 If x+y=5, find xy (find the product of x and y if x+y = 5)
  • Elimination method
    rovnice_1 Solve system of linear equations by elimination method: 5/2x + 3/5y= 4/15 1/2x + 2/5y= 2/15
  • Linsys2
    linear_eq_3 Solve two equations with two unknowns: 400x+120y=147.2 350x+200y=144
  • Non linear eqs
    q2_non_linear Solve the system of non-linear equations: 3x2-3x-y=-2 -6x2-x-y=-7
  • Equation 25
    eq1_2 Solve following simple equation: 3/4(x+5)=1/2(x+9)
  • Prove
    two_circles_1 Prove that k1 and k2 are the equations of two circles. Find the equation of the line that passes through the centers of these circles. k1: x2+y2+2x+4y+1=0 k2: x2+y2-8x+6y+9=0
  • Intersections 3
    intersect_circles Find the intersections of the circles x2 + y2 + 6 x - 10 y + 9 = 0 and x2 + y2 + 18 x + 4 y + 21 = 0
  • The angle of lines
    lines Calculate the angle of two lines y=x-21 and y=-2x+14
  • Three points 4
    linearna The line passed through three points - see table: x y -6 4 -4 3 -2 2 Write line equation in y=mx+b form
  • Stock market
    money_1 Simon one day decided to invest € 62000 to the stock market. After six months, he invested July 25 stock markets fell by 47%. Fortunately for Simon, from July 25 5 to October 25 his shares have risen by 39%. Simon is then: ?