40+r=4-5(1+8r)

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Solution for 40+r=4-5(1+8r) equation:


Simplifying
40 + r = 4 + -5(1 + 8r)
40 + r = 4 + (1 * -5 + 8r * -5)
40 + r = 4 + (-5 + -40r)

Combine like terms: 4 + -5 = -1
40 + r = -1 + -40r

Solving
40 + r = -1 + -40r

Solving for variable 'r'.

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

Add '40r' to each side of the equation.
40 + r + 40r = -1 + -40r + 40r

Combine like terms: r + 40r = 41r
40 + 41r = -1 + -40r + 40r

Combine like terms: -40r + 40r = 0
40 + 41r = -1 + 0
40 + 41r = -1

Add '-40' to each side of the equation.
40 + -40 + 41r = -1 + -40

Combine like terms: 40 + -40 = 0
0 + 41r = -1 + -40
41r = -1 + -40

Combine like terms: -1 + -40 = -41
41r = -41

Divide each side by '41'.
r = -1

Simplifying
r = -1

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