A.20 | B.8 | C.10 |
A.36+15=51 | B.45a>126 | C.16a=78 |
A.72÷x=1.2 | B.8x=96÷2 |
C.(30-x)×5=100 | D.9x-48=20 |
A.5×3=15 | B.x+5 | C.3×2+x=22 |
A.0.25÷x=2.5 解:x=2.5÷0.25 x=10 |
B.0.25÷x=2.5 解:=0.25÷2.5 =0.1 |
C.0.25÷x=2.5 解:x=0.25÷2.5 x=0.1 |
D.0.25÷x=2.5 解:x=2.5×0.25 x=0.625 |
A.x+5=10 | B.5-x=2 | C.3+y=10 | D.37-x=30 |
x | x | x | x | ||
y | y | y | |||
x | 4.5 |