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Simplifying Noitsx + -1(4x + -7) = 5x(x + 21) Reorder the terms: iostxN + -1(-7 + 4x) = 5x(x + 21) iostxN + (-7 * -1 + 4x * -1) = 5x(x + 21) iostxN + (7 + -4x) = 5x(x + 21) Reorder the terms: 7 + iostxN + -4x = 5x(x + 21) Reorder the terms: 7 + iostxN + -4x = 5x(21 + x) 7 + iostxN + -4x = (21 * 5x + x * 5x) 7 + iostxN + -4x = (105x + 5x2) Solving 7 + iostxN + -4x = 105x + 5x2 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + iostxN + -7 + -4x = 105x + -7 + 5x2 Reorder the terms: 7 + -7 + iostxN + -4x = 105x + -7 + 5x2 Combine like terms: 7 + -7 = 0 0 + iostxN + -4x = 105x + -7 + 5x2 iostxN + -4x = 105x + -7 + 5x2 Reorder the terms: iostxN + -4x = -7 + 105x + 5x2 Add '4x' to each side of the equation. iostxN + -4x + 4x = -7 + 105x + 4x + 5x2 Combine like terms: -4x + 4x = 0 iostxN + 0 = -7 + 105x + 4x + 5x2 iostxN = -7 + 105x + 4x + 5x2 Combine like terms: 105x + 4x = 109x iostxN = -7 + 109x + 5x2 Divide each side by 'ostxN'. i = -7o-1s-1t-1x-1N-1 + 109o-1s-1t-1N-1 + 5o-1s-1t-1xN-1 Simplifying i = -7o-1s-1t-1x-1N-1 + 109o-1s-1t-1N-1 + 5o-1s-1t-1xN-1 Reorder the terms: i = 109o-1s-1t-1N-1 + -7o-1s-1t-1x-1N-1 + 5o-1s-1t-1xN-1
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