7[2-(3+4)r]-2r=-9+2(1-15r)

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Solution for 7[2-(3+4)r]-2r=-9+2(1-15r) equation:


Simplifying
7[2 + -1(3 + 4) * r] + -2r = -9 + 2(1 + -15r)

Combine like terms: 3 + 4 = 7
7[2 + -1(7) * r] + -2r = -9 + 2(1 + -15r)

Multiply -1 * 7
7[2 + -7r] + -2r = -9 + 2(1 + -15r)
[2 * 7 + -7r * 7] + -2r = -9 + 2(1 + -15r)
[14 + -49r] + -2r = -9 + 2(1 + -15r)

Combine like terms: -49r + -2r = -51r
14 + -51r = -9 + 2(1 + -15r)
14 + -51r = -9 + (1 * 2 + -15r * 2)
14 + -51r = -9 + (2 + -30r)

Combine like terms: -9 + 2 = -7
14 + -51r = -7 + -30r

Solving
14 + -51r = -7 + -30r

Solving for variable 'r'.

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

Add '30r' to each side of the equation.
14 + -51r + 30r = -7 + -30r + 30r

Combine like terms: -51r + 30r = -21r
14 + -21r = -7 + -30r + 30r

Combine like terms: -30r + 30r = 0
14 + -21r = -7 + 0
14 + -21r = -7

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

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

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

Divide each side by '-21'.
r = 1

Simplifying
r = 1

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