-7=-(1-2r)+2(1-3r)

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Solution for -7=-(1-2r)+2(1-3r) equation:


Simplifying
-7 = -1(1 + -2r) + 2(1 + -3r)
-7 = (1 * -1 + -2r * -1) + 2(1 + -3r)
-7 = (-1 + 2r) + 2(1 + -3r)
-7 = -1 + 2r + (1 * 2 + -3r * 2)
-7 = -1 + 2r + (2 + -6r)

Reorder the terms:
-7 = -1 + 2 + 2r + -6r

Combine like terms: -1 + 2 = 1
-7 = 1 + 2r + -6r

Combine like terms: 2r + -6r = -4r
-7 = 1 + -4r

Solving
-7 = 1 + -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.
-7 + 4r = 1 + -4r + 4r

Combine like terms: -4r + 4r = 0
-7 + 4r = 1 + 0
-7 + 4r = 1

Add '7' to each side of the equation.
-7 + 7 + 4r = 1 + 7

Combine like terms: -7 + 7 = 0
0 + 4r = 1 + 7
4r = 1 + 7

Combine like terms: 1 + 7 = 8
4r = 8

Divide each side by '4'.
r = 2

Simplifying
r = 2

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