7r-42=7(-3+2r)

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Solution for 7r-42=7(-3+2r) equation:


Simplifying
7r + -42 = 7(-3 + 2r)

Reorder the terms:
-42 + 7r = 7(-3 + 2r)
-42 + 7r = (-3 * 7 + 2r * 7)
-42 + 7r = (-21 + 14r)

Solving
-42 + 7r = -21 + 14r

Solving for variable 'r'.

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

Add '-14r' to each side of the equation.
-42 + 7r + -14r = -21 + 14r + -14r

Combine like terms: 7r + -14r = -7r
-42 + -7r = -21 + 14r + -14r

Combine like terms: 14r + -14r = 0
-42 + -7r = -21 + 0
-42 + -7r = -21

Add '42' to each side of the equation.
-42 + 42 + -7r = -21 + 42

Combine like terms: -42 + 42 = 0
0 + -7r = -21 + 42
-7r = -21 + 42

Combine like terms: -21 + 42 = 21
-7r = 21

Divide each side by '-7'.
r = -3

Simplifying
r = -3

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