Question

1. -4(m-7)=72


2. 5(x+6=15(x-6)



3. 3(x+4)=4(x+1)

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Answer 1

 1. -4(m-7)=72

m-7=-18

m=-18+7

m=-11

 

 2. 5(x+6)=15(x-6)

5x+30=15x-90

5x-15x=-90-30

-10x-120

x=12  

 

 3. 3(x+4)=4(x+1)

3x+12=4x+4

3x-4x=4-12

-x=-8

x=8