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Simplifying [-7a] + -10 = 20 + -3a Reorder the terms: -10 + [-7a] = 20 + -3a Solving -10 + [-7a] = 20 + -3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3a' to each side of the equation. -10 + [-7a] + 3a = 20 + -3a + 3a Combine like terms: [-7a] + 3a = -4a -10 + -4a = 20 + -3a + 3a Combine like terms: -3a + 3a = 0 -10 + -4a = 20 + 0 -10 + -4a = 20 Add '10' to each side of the equation. -10 + 10 + -4a = 20 + 10 Combine like terms: -10 + 10 = 0 0 + -4a = 20 + 10 -4a = 20 + 10 Combine like terms: 20 + 10 = 30 -4a = 30 Divide each side by '-4'. a = -7.5 Simplifying a = -7.5
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