8x-0.5x=60
7.5x=60
7.5x÷7.5=60÷7.5
x=8;
2x-87=44.2
2x-87+87=44.2+87
2x=131.2
2x÷2=131.2÷2
x=65.6;
3(x+2.1)=31.5
3x+6.3=31.5
3x+6.3-6.3=31.5-6.3
3x=25.2
3x÷3=25.2÷3
x=8.4;
(x-3)÷4=7.5
(x-3)÷4×4=7.5×4
x-3=30
x-3+3=30+3
x=33.
8x-0.5x=60
7.5x=60
7.5x÷7.5=60÷7.5
x=8;
2x-87=44.2
2x-87+87=44.2+87
2x=131.2
2x÷2=131.2÷2
x=65.6;
3(x+2.1)=31.5
3x+6.3=31.5
3x+6.3-6.3=31.5-6.3
3x=25.2
3x÷3=25.2÷3
x=8.4;
(x-3)÷4=7.5
(x-3)÷4×4=7.5×4
x-3=30
x-3+3=30+3
x=33.