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

#### Number of problems found: 328

- Solve equation

solve equation: ? - 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) - Hyperbola equation

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

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

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

Given 2x =0.125 find the value of x - Simple equation 3

24 = n • 27, solve for n - Completing square

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

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

Solve goniometric equation: sin^{4}θ - 1/cos^{2}θ=cos^{2}θ - 2 - 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? - Demographics

The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase of population? - The midpoint

The midpoint of (2, 5) and (8, y) is (5, -1). Find the line equation in slope-intercept form. - Expressions 3

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

How do I calculate a number x that is 9 greater than its reciprocal (1/x)? - Which

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

Find x, if 625 ^ x = 5 The equation is exponential because the unknown is in the exponential power of 625 - Find the 13

Find the equation of the circle inscribed in the rhombus ABCD where A[1, -2], B[8, -3] and C[9, 4]. - On line

On line p: x = 4 + t, y = 3 + 2t, t is R, find point C, which has the same distance from points A [1,2] and B [-1,0].

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