1)
1.8(2x+1)= 2*8.1
3.6x+1.8=16.2
3.6x=14.4
x=4
2)
0.7(3x-1)=2.8*3.5
2.1x-0.7=9.8
2.1x=9.8+0.7
2.1x=10.5
x=5
3)
2.1(2x-1)=7.5*1.4
4.2x-2.1=10.5
4.2x=10.5+2.1
4.2x=12.6
x=3
1)
1.8(2x+1)= 2*8.1
3.6x+1.8=16.2
3.6x=14.4
x=4
2)
0.7(3x-1)=2.8*3.5
2.1x-0.7=9.8
2.1x=9.8+0.7
2.1x=10.5
x=5
3)
2.1(2x-1)=7.5*1.4
4.2x-2.1=10.5
4.2x=10.5+2.1
4.2x=12.6
x=3