5(x-4)-3(x-4)+7(x-4)
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Step-by-step explanation:
5(x-4)-3(x-4)+7(x-4)
=> 5x-20-3x+12+7x-28
=> 5x-3x+7x-20+12-28
=> 12x-3x-48+12
=> 9x-36
=> 9(x-4)
other answer by factorisation method
5(x-4)-3(x-4)+7(x-4)
=> (x-4)(5-3+7)
=> (x-4)(12-3)
=> (x-4)×9
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