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Simplifying -140 = 7x + 7(-7 + 10) Combine like terms: -7 + 10 = 3 -140 = 7x + 7(3) Multiply 7 * 3 -140 = 7x + 21 Reorder the terms: -140 = 21 + 7x Solving -140 = 21 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. -140 + -7x = 21 + 7x + -7x Combine like terms: 7x + -7x = 0 -140 + -7x = 21 + 0 -140 + -7x = 21 Add '140' to each side of the equation. -140 + 140 + -7x = 21 + 140 Combine like terms: -140 + 140 = 0 0 + -7x = 21 + 140 -7x = 21 + 140 Combine like terms: 21 + 140 = 161 -7x = 161 Divide each side by '-7'. x = -23 Simplifying x = -23
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