-87=1+8(r-3)

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Solution for -87=1+8(r-3) equation:


Simplifying
-87 = 1 + 8(r + -3)

Reorder the terms:
-87 = 1 + 8(-3 + r)
-87 = 1 + (-3 * 8 + r * 8)
-87 = 1 + (-24 + 8r)

Combine like terms: 1 + -24 = -23
-87 = -23 + 8r

Solving
-87 = -23 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
-87 + -8r = -23 + 8r + -8r

Combine like terms: 8r + -8r = 0
-87 + -8r = -23 + 0
-87 + -8r = -23

Add '87' to each side of the equation.
-87 + 87 + -8r = -23 + 87

Combine like terms: -87 + 87 = 0
0 + -8r = -23 + 87
-8r = -23 + 87

Combine like terms: -23 + 87 = 64
-8r = 64

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

Simplifying
r = -8

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