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Simplifying 2a + -1(-3b) + -7a + -5b = 0 Remove parenthesis around (-3b) 2a + -1 * -3b + -7a + -5b = 0 Multiply -1 * -3 2a + 3b + -7a + -5b = 0 Reorder the terms: 2a + -7a + 3b + -5b = 0 Combine like terms: 2a + -7a = -5a -5a + 3b + -5b = 0 Combine like terms: 3b + -5b = -2b -5a + -2b = 0 Solving -5a + -2b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2b' to each side of the equation. -5a + -2b + 2b = 0 + 2b Combine like terms: -2b + 2b = 0 -5a + 0 = 0 + 2b -5a = 0 + 2b Remove the zero: -5a = 2b Divide each side by '-5'. a = -0.4b Simplifying a = -0.4b
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