-7(4-r)+7=3(1+5r)

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Solution for -7(4-r)+7=3(1+5r) equation:


Simplifying
-7(4 + -1r) + 7 = 3(1 + 5r)
(4 * -7 + -1r * -7) + 7 = 3(1 + 5r)
(-28 + 7r) + 7 = 3(1 + 5r)

Reorder the terms:
-28 + 7 + 7r = 3(1 + 5r)

Combine like terms: -28 + 7 = -21
-21 + 7r = 3(1 + 5r)
-21 + 7r = (1 * 3 + 5r * 3)
-21 + 7r = (3 + 15r)

Solving
-21 + 7r = 3 + 15r

Solving for variable 'r'.

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

Add '-15r' to each side of the equation.
-21 + 7r + -15r = 3 + 15r + -15r

Combine like terms: 7r + -15r = -8r
-21 + -8r = 3 + 15r + -15r

Combine like terms: 15r + -15r = 0
-21 + -8r = 3 + 0
-21 + -8r = 3

Add '21' to each side of the equation.
-21 + 21 + -8r = 3 + 21

Combine like terms: -21 + 21 = 0
0 + -8r = 3 + 21
-8r = 3 + 21

Combine like terms: 3 + 21 = 24
-8r = 24

Divide each side by '-8'.
r = -3

Simplifying
r = -3

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