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Simplifying 6.2(7 + -1x) + 4x = 20 (7 * 6.2 + -1x * 6.2) + 4x = 20 (43.4 + -6.2x) + 4x = 20 Combine like terms: -6.2x + 4x = -2.2x 43.4 + -2.2x = 20 Solving 43.4 + -2.2x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-43.4' to each side of the equation. 43.4 + -43.4 + -2.2x = 20 + -43.4 Combine like terms: 43.4 + -43.4 = 0.0 0.0 + -2.2x = 20 + -43.4 -2.2x = 20 + -43.4 Combine like terms: 20 + -43.4 = -23.4 -2.2x = -23.4 Divide each side by '-2.2'. x = 10.63636364 Simplifying x = 10.63636364
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