3(x-7)+5(x-4)=15

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Solution for 3(x-7)+5(x-4)=15 equation:


Simplifying
3(x + -7) + 5(x + -4) = 15

Reorder the terms:
3(-7 + x) + 5(x + -4) = 15
(-7 * 3 + x * 3) + 5(x + -4) = 15
(-21 + 3x) + 5(x + -4) = 15

Reorder the terms:
-21 + 3x + 5(-4 + x) = 15
-21 + 3x + (-4 * 5 + x * 5) = 15
-21 + 3x + (-20 + 5x) = 15

Reorder the terms:
-21 + -20 + 3x + 5x = 15

Combine like terms: -21 + -20 = -41
-41 + 3x + 5x = 15

Combine like terms: 3x + 5x = 8x
-41 + 8x = 15

Solving
-41 + 8x = 15

Solving for variable 'x'.

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

Add '41' to each side of the equation.
-41 + 41 + 8x = 15 + 41

Combine like terms: -41 + 41 = 0
0 + 8x = 15 + 41
8x = 15 + 41

Combine like terms: 15 + 41 = 56
8x = 56

Divide each side by '8'.
x = 7

Simplifying
x = 7

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