25-7r=8(-5r-1)

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Solution for 25-7r=8(-5r-1) equation:


Simplifying
25 + -7r = 8(-5r + -1)

Reorder the terms:
25 + -7r = 8(-1 + -5r)
25 + -7r = (-1 * 8 + -5r * 8)
25 + -7r = (-8 + -40r)

Solving
25 + -7r = -8 + -40r

Solving for variable 'r'.

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

Add '40r' to each side of the equation.
25 + -7r + 40r = -8 + -40r + 40r

Combine like terms: -7r + 40r = 33r
25 + 33r = -8 + -40r + 40r

Combine like terms: -40r + 40r = 0
25 + 33r = -8 + 0
25 + 33r = -8

Add '-25' to each side of the equation.
25 + -25 + 33r = -8 + -25

Combine like terms: 25 + -25 = 0
0 + 33r = -8 + -25
33r = -8 + -25

Combine like terms: -8 + -25 = -33
33r = -33

Divide each side by '33'.
r = -1

Simplifying
r = -1

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