-381=7(8r+5)-4r

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Solution for -381=7(8r+5)-4r equation:


Simplifying
-381 = 7(8r + 5) + -4r

Reorder the terms:
-381 = 7(5 + 8r) + -4r
-381 = (5 * 7 + 8r * 7) + -4r
-381 = (35 + 56r) + -4r

Combine like terms: 56r + -4r = 52r
-381 = 35 + 52r

Solving
-381 = 35 + 52r

Solving for variable 'r'.

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

Add '-52r' to each side of the equation.
-381 + -52r = 35 + 52r + -52r

Combine like terms: 52r + -52r = 0
-381 + -52r = 35 + 0
-381 + -52r = 35

Add '381' to each side of the equation.
-381 + 381 + -52r = 35 + 381

Combine like terms: -381 + 381 = 0
0 + -52r = 35 + 381
-52r = 35 + 381

Combine like terms: 35 + 381 = 416
-52r = 416

Divide each side by '-52'.
r = -8

Simplifying
r = -8

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