-5(5r+7)-4(7+5r)=72

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Solution for -5(5r+7)-4(7+5r)=72 equation:


Simplifying
-5(5r + 7) + -4(7 + 5r) = 72

Reorder the terms:
-5(7 + 5r) + -4(7 + 5r) = 72
(7 * -5 + 5r * -5) + -4(7 + 5r) = 72
(-35 + -25r) + -4(7 + 5r) = 72
-35 + -25r + (7 * -4 + 5r * -4) = 72
-35 + -25r + (-28 + -20r) = 72

Reorder the terms:
-35 + -28 + -25r + -20r = 72

Combine like terms: -35 + -28 = -63
-63 + -25r + -20r = 72

Combine like terms: -25r + -20r = -45r
-63 + -45r = 72

Solving
-63 + -45r = 72

Solving for variable 'r'.

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

Add '63' to each side of the equation.
-63 + 63 + -45r = 72 + 63

Combine like terms: -63 + 63 = 0
0 + -45r = 72 + 63
-45r = 72 + 63

Combine like terms: 72 + 63 = 135
-45r = 135

Divide each side by '-45'.
r = -3

Simplifying
r = -3

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