-18=-2+4(r-7)

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Solution for -18=-2+4(r-7) equation:


Simplifying
-18 = -2 + 4(r + -7)

Reorder the terms:
-18 = -2 + 4(-7 + r)
-18 = -2 + (-7 * 4 + r * 4)
-18 = -2 + (-28 + 4r)

Combine like terms: -2 + -28 = -30
-18 = -30 + 4r

Solving
-18 = -30 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
-18 + -4r = -30 + 4r + -4r

Combine like terms: 4r + -4r = 0
-18 + -4r = -30 + 0
-18 + -4r = -30

Add '18' to each side of the equation.
-18 + 18 + -4r = -30 + 18

Combine like terms: -18 + 18 = 0
0 + -4r = -30 + 18
-4r = -30 + 18

Combine like terms: -30 + 18 = -12
-4r = -12

Divide each side by '-4'.
r = 3

Simplifying
r = 3

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