3 years ago

−2x−(−5−4x)=−5(2x−7)

Mathematics

1 answer:

hoa [83]3 years ago

6 0

Answer:

x = 2.5

Step-by-step explanation:

- 2x - ( - 5 - 4x ) = - 5 ( 2x - 7 )

- 2x + 5 + 4x = - 10x + 35

- 2x + 4x + 10x = 35 - 5

12x = 30

x =  $\frac{5}{2}$  = 2.5

Check the answer:

L.H.S. = - 2(2.5) - [ - 5 - 4(2.5) ] = 10

R.H.S. = - 5 [ 2(2.5) - 7 ] = 10

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