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Simplifying 3 + -2(x + -21) = -76 + -1x Reorder the terms: 3 + -2(-21 + x) = -76 + -1x 3 + (-21 * -2 + x * -2) = -76 + -1x 3 + (42 + -2x) = -76 + -1x Combine like terms: 3 + 42 = 45 45 + -2x = -76 + -1x Solving 45 + -2x = -76 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. 45 + -2x + x = -76 + -1x + x Combine like terms: -2x + x = -1x 45 + -1x = -76 + -1x + x Combine like terms: -1x + x = 0 45 + -1x = -76 + 0 45 + -1x = -76 Add '-45' to each side of the equation. 45 + -45 + -1x = -76 + -45 Combine like terms: 45 + -45 = 0 0 + -1x = -76 + -45 -1x = -76 + -45 Combine like terms: -76 + -45 = -121 -1x = -121 Divide each side by '-1'. x = 121 Simplifying x = 121
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