Answer:
x=10
Explanation:
x = 10
x(x) + x(4) – 5(x) – 5(4) = x(x) + x(–3)
x² + 4x - 5x -20 = x² - 3x
Collect like terms
x² - x² + 4x -5x +3x -20 = 0
2x = -20
Divide through by 2
X = 10
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