7(-5r-5)-8=4(1+5r)-8r

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Solution for 7(-5r-5)-8=4(1+5r)-8r equation:


Simplifying
7(-5r + -5) + -8 = 4(1 + 5r) + -8r

Reorder the terms:
7(-5 + -5r) + -8 = 4(1 + 5r) + -8r
(-5 * 7 + -5r * 7) + -8 = 4(1 + 5r) + -8r
(-35 + -35r) + -8 = 4(1 + 5r) + -8r

Reorder the terms:
-35 + -8 + -35r = 4(1 + 5r) + -8r

Combine like terms: -35 + -8 = -43
-43 + -35r = 4(1 + 5r) + -8r
-43 + -35r = (1 * 4 + 5r * 4) + -8r
-43 + -35r = (4 + 20r) + -8r

Combine like terms: 20r + -8r = 12r
-43 + -35r = 4 + 12r

Solving
-43 + -35r = 4 + 12r

Solving for variable 'r'.

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

Add '-12r' to each side of the equation.
-43 + -35r + -12r = 4 + 12r + -12r

Combine like terms: -35r + -12r = -47r
-43 + -47r = 4 + 12r + -12r

Combine like terms: 12r + -12r = 0
-43 + -47r = 4 + 0
-43 + -47r = 4

Add '43' to each side of the equation.
-43 + 43 + -47r = 4 + 43

Combine like terms: -43 + 43 = 0
0 + -47r = 4 + 43
-47r = 4 + 43

Combine like terms: 4 + 43 = 47
-47r = 47

Divide each side by '-47'.
r = -1

Simplifying
r = -1

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