(1) | (2) | (3) | (4) |
B | A | A | B |
(1)23x=92 x=92÷23 x=4 |
(2)x÷1.2=60 x=60×1.2 x=72 |
(3)x÷25=4
x=25×4
x=100
|
(4)30x=15 x=15÷30 x=0.56 |
(5)3x=1.08 x=1.08÷3 x=0.36 |
(6)x÷3=2.1
x=2.1×3
x=6.3
|
图一 | 图二 |
2.8x=4.2
x=4.2÷2.8
x=1.5
|
12x=300
x=300÷12
x=25
|
(1)n÷25=3
n=25×3
n=75
|
(2) 3n=75
n=75÷3
n=25
|
(3)3x=180
x=180÷3
x=60
|
(4) 60x=180
x=180÷60
x=3
|