Răspuns :
x+7+2x=97
3x=97-7
3x=90
x=90:3
x=30
2x+4=40
2x=40-4
2x=36
x=18
x+3=5x2
x+3=10
x=10-3
x=7
3x=97-7
3x=90
x=90:3
x=30
2x+4=40
2x=40-4
2x=36
x=18
x+3=5x2
x+3=10
x=10-3
x=7
1) x+2x=97-7
3x=90
x=90:3=30
2) 2x+4=40
2x=40-4
2x=36
x=36:2=18
3) x+3=5x2
x+3=10
x=10-3=7
3x=90
x=90:3=30
2) 2x+4=40
2x=40-4
2x=36
x=36:2=18
3) x+3=5x2
x+3=10
x=10-3=7