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Simplifying 20a + 28b = (a + 7b) Remove parenthesis around (a + 7b) 20a + 28b = a + 7b Solving 20a + 28b = a + 7b Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1a' to each side of the equation. 20a + -1a + 28b = a + -1a + 7b Combine like terms: 20a + -1a = 19a 19a + 28b = a + -1a + 7b Combine like terms: a + -1a = 0 19a + 28b = 0 + 7b 19a + 28b = 7b Add '-28b' to each side of the equation. 19a + 28b + -28b = 7b + -28b Combine like terms: 28b + -28b = 0 19a + 0 = 7b + -28b 19a = 7b + -28b Combine like terms: 7b + -28b = -21b 19a = -21b Divide each side by '19'. a = -1.105263158b Simplifying a = -1.105263158b
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