5(x _4)_3(x_4)+7(x_4)
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5x-20 -3x+4+7x-4
=2x-20
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0
Answer:
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) (∵ like terms adding )
= (12x - 3x ) + ( - 48 + 12 ) ( ∵ adding, - 20 -28 = - 48 )
= 9x + ( - 36)
= 9x - 36 or 9 ( x - 4 ) is the answer. ( ∵ + × - = - )
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