(17x-15)+(4x-21)=90

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Solution for (17x-15)+(4x-21)=90 equation:


Simplifying
(17x + -15) + (4x + -21) = 90

Reorder the terms:
(-15 + 17x) + (4x + -21) = 90

Remove parenthesis around (-15 + 17x)
-15 + 17x + (4x + -21) = 90

Reorder the terms:
-15 + 17x + (-21 + 4x) = 90

Remove parenthesis around (-21 + 4x)
-15 + 17x + -21 + 4x = 90

Reorder the terms:
-15 + -21 + 17x + 4x = 90

Combine like terms: -15 + -21 = -36
-36 + 17x + 4x = 90

Combine like terms: 17x + 4x = 21x
-36 + 21x = 90

Solving
-36 + 21x = 90

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '36' to each side of the equation.
-36 + 36 + 21x = 90 + 36

Combine like terms: -36 + 36 = 0
0 + 21x = 90 + 36
21x = 90 + 36

Combine like terms: 90 + 36 = 126
21x = 126

Divide each side by '21'.
x = 6

Simplifying
x = 6

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