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BabaBlast [244]
3 years ago
9

-7×-3×=-8×-8

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Mathematics
1 answer:
Makovka662 [10]3 years ago
3 0

Answer:

<h2>x = 4</h2>

Step-by-step explanation:

-7x-3x=-8x-8\\\\-10x=-8x-8\qquad\text{add}\ 8x\ \text{to both sides}\\\\-10x+8x=-8x+8x-8\\\\-2x=-8\qquad\text{divide both sides by (-2)}\\\\\dfrac{-2x}{-2}=\dfrac{-8}{-2}\\\\x=4

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Answer:

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Step-by-step explanation:

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3 years ago
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7 0
3 years ago
Percy solved the equation x2 + 7x + 12 = 12. His work is shown below. Is Percy correct? Explain.
antoniya [11.8K]
= > x² + 7x + 12 = 12

= > x² + ( 4 + 3 )x + 12 = 12

= > x² + 4x + 3x + 12 = 12

= > x( x + 4 ) + 3( x + 4 ) = 12

= > ( x + 4 ) ( x + 3 ) = 12


Percy did correct till this step. But by doing like this, Percy can't get the values of the variable x.



Percy should follow the following steps :

= > x² + 7x + 12 = 12


Add -12 on both sides,


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= > ( x = 0 ) or ( x = - 7 )



Hence, required value(s) of x is 0 or -7
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