-45=4-7(3r-8)

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Solution for -45=4-7(3r-8) equation:


Simplifying
-45 = 4 + -7(3r + -8)

Reorder the terms:
-45 = 4 + -7(-8 + 3r)
-45 = 4 + (-8 * -7 + 3r * -7)
-45 = 4 + (56 + -21r)

Combine like terms: 4 + 56 = 60
-45 = 60 + -21r

Solving
-45 = 60 + -21r

Solving for variable 'r'.

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

Add '21r' to each side of the equation.
-45 + 21r = 60 + -21r + 21r

Combine like terms: -21r + 21r = 0
-45 + 21r = 60 + 0
-45 + 21r = 60

Add '45' to each side of the equation.
-45 + 45 + 21r = 60 + 45

Combine like terms: -45 + 45 = 0
0 + 21r = 60 + 45
21r = 60 + 45

Combine like terms: 60 + 45 = 105
21r = 105

Divide each side by '21'.
r = 5

Simplifying
r = 5

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