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Simplifying 4x + -1y + 2x + 3y + 7 = 90 Reorder the terms: 7 + 4x + 2x + -1y + 3y = 90 Combine like terms: 4x + 2x = 6x 7 + 6x + -1y + 3y = 90 Combine like terms: -1y + 3y = 2y 7 + 6x + 2y = 90 Solving 7 + 6x + 2y = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + 6x + -7 + 2y = 90 + -7 Reorder the terms: 7 + -7 + 6x + 2y = 90 + -7 Combine like terms: 7 + -7 = 0 0 + 6x + 2y = 90 + -7 6x + 2y = 90 + -7 Combine like terms: 90 + -7 = 83 6x + 2y = 83 Add '-2y' to each side of the equation. 6x + 2y + -2y = 83 + -2y Combine like terms: 2y + -2y = 0 6x + 0 = 83 + -2y 6x = 83 + -2y Divide each side by '6'. x = 13.83333333 + -0.3333333333y Simplifying x = 13.83333333 + -0.3333333333y
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