1-3(r-7)=7

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


Simplifying
1 + -3(r + -7) = 7

Reorder the terms:
1 + -3(-7 + r) = 7
1 + (-7 * -3 + r * -3) = 7
1 + (21 + -3r) = 7

Combine like terms: 1 + 21 = 22
22 + -3r = 7

Solving
22 + -3r = 7

Solving for variable 'r'.

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

Add '-22' to each side of the equation.
22 + -22 + -3r = 7 + -22

Combine like terms: 22 + -22 = 0
0 + -3r = 7 + -22
-3r = 7 + -22

Combine like terms: 7 + -22 = -15
-3r = -15

Divide each side by '-3'.
r = 5

Simplifying
r = 5

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