# Equation + expression of a variable from the formula - math problems

#### Number of problems found: 347

- Equation 23

Find value of unknown x in equation: x+3/x+1=5 (problem finding x) - Simplify

Simplify expression - which expression is equivalent to: 3(m + 2) − 4(2m − 9) - Expression with powers

If x-1/x=5, find the value of x^{4}+1/x^{4} - Solve equation

solve equation: ? - Given

Given 2x =0.125 find the value of x - Hyperbola equation

Find the hyperbola equation with the center of S [0; 0], passing through the points: A [5; 3] B [8; -10] - Simple equation 3

24 = n • 27, solve for n - Evaluation of expressions

If a^{2}-3a+1=0, find (i)a^{2}+1/a^{2}(ii) a^{3}+1/a^{3} - Parametric equation

Find the parametric equation of a line with y-intercept (0,-4) and a slope of -2. - The midpoint

The midpoint of (2, 5) and (8, y) is (5, -1). Find the line equation in slope-intercept form. - Height of the arc - formula

Calculate the height of the arc if the length of the arc is 77 and chord length 40. Does exist a formula to solve this? - Which

Which decimals when subtracted equal 3.89: a - b = 3.89 - Sphere equation

Obtain the equation of sphere its centre on the line 3x+2z=0=4x-5y and passes through the points (0,-2,-4) and (2,-1,1). - Equation of circle 2

Find the equation of a circle that touches the axis of y at a distance of 4 from the origin and cuts off an intercept of length 6 on the axis x. - Substitution method

Solve goniometric equation: sin^{4}θ - 1/cos^{2}θ=cos^{2}θ - 2 - Roots and coefficient

In the equation 2x ^ 2 + bx-9 = 0 is one root x1 = -3/2. Determine the second root and the coefficient b. - Expressions 3

If k(x+6)= 4x^{2}+ 20, what is k(10)=? - Exponential equation

Find x, if 625 ^ x = 5 The equation is exponential because the unknown is in the exponential power of 625 - Even / odd numbers

a / Using variable n write two consecutive odd numbers. b / the sum of three consecutive odd numbers is 333. What are this numbers? - Completing square

Solve the quadratic equation: m^{2}=4m+20 using completing the square method

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