A.2x-40+40=50+40 | B.4x-80=100 | C.2x=50+40 | D.2x-30=40 |
A.150-10 | B.x+lO=150 | C.x-150=10 | D.x-10=150 |
A.x=10-2 | B.2x=10 | C.10+2=x |
A.0 | B.1 | C.2 | D.3 |
A.3x=4.5 | B.4x÷3=6 | C.2x+9=15 |
A.2x-40=4 | B.40-4=2x | C.2x=40+4 |
A.4.5x+2x=11.5 | B.4x-1.2=3.8 | C.0.3x-0.1x=0.5 |
A.6 | B.0.2 | C.0.3 |
A.a-b=6 | B.a-6=b+6 | C.a-b=6×2 | D.b+6×2=a |