i. 2x - 5[4 + 3 (x + 2)] = 9
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2x-5[4+3(x+2)]=9
2x-5[7(x+2)]=9
2x-5[7x+14]=9
14x^2+28x-35x-70=9
14x^2-7x-70=9
14x^2-7x-70-79=0
14x^2-7x-79=0
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