Question

b) 10x-9=21+2x+3x
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c)3x-2x +10=10+5x-40
d) 10-(8x+2)=5x+2(-4x+1)

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equação por favor e para amanhã de manhã
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Answer 1

b)

10x-9=21+2x+3x

10x-2x-3x=21+9

5x=30

x=30/5

x=6

c)

3x-2x+10=10+5x-40

10-10+40=5x-3x+2x

40=4x

40/4=x

x=10

d)

10-(8x+2)=5x+2(-4x+1)

10-8x-2=5x-8x+2

10-2-2=5x-8x+8x

6=5x

x=6/5