-4+5(r-4)=-40+7r

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Solution for -4+5(r-4)=-40+7r equation:


Simplifying
-4 + 5(r + -4) = -40 + 7r

Reorder the terms:
-4 + 5(-4 + r) = -40 + 7r
-4 + (-4 * 5 + r * 5) = -40 + 7r
-4 + (-20 + 5r) = -40 + 7r

Combine like terms: -4 + -20 = -24
-24 + 5r = -40 + 7r

Solving
-24 + 5r = -40 + 7r

Solving for variable 'r'.

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

Add '-7r' to each side of the equation.
-24 + 5r + -7r = -40 + 7r + -7r

Combine like terms: 5r + -7r = -2r
-24 + -2r = -40 + 7r + -7r

Combine like terms: 7r + -7r = 0
-24 + -2r = -40 + 0
-24 + -2r = -40

Add '24' to each side of the equation.
-24 + 24 + -2r = -40 + 24

Combine like terms: -24 + 24 = 0
0 + -2r = -40 + 24
-2r = -40 + 24

Combine like terms: -40 + 24 = -16
-2r = -16

Divide each side by '-2'.
r = 8

Simplifying
r = 8

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