Question

Resolva a equação a seguir: 2x – 4 (x – 7) = 15 – 3(x – 2)

Answer 1

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vamos lá

2x−4(x−7)=15−3(x−2)

2x+(−4)(x)+(−4)(−7)=15+(−3)(x)+(−3)(−2)

2x+−4x+28=15+−3x+6

(2x+−4x)+(28)=(−3x)+(15+6)

−2x+28=−3x+21

−2x+28=−3x+21

−2x+28+3x=−3x+21+3x

x+28=21

x+28−28=21−28

x=−7