1) 4x+(x+2)=27
4x+x+2=27
5x+2=27
5x=27-2
5x=25
x=5
2) x+(x-1)+2x=21
2x+2x-1=21
4x-1=21
4x=22
x=5,5
3) 7x-14=21
7x=35
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Verified answer
1) 4x+(x+2)=27
4x+x+2=27
5x+2=27
5x=27-2
5x=25
x=5
2) x+(x-1)+2x=21
2x+2x-1=21
4x-1=21
4x=22
x=5,5
3) 7x-14=21
7x=35
x=5