(1) | (2) | (3) | (4) | (5) |
A | B | A | C | C |
(1)280+x=760
x=760-280
x=480
|
(2)x-0.7=9.7
x=9.7+0.7
x=10.4
|
(3)x÷3.2=0.5
x=3.2×0.5
x=1.6
|
(4)12x-120=720
12x=840
x=70
|
(5)2.8x÷2=7
2.8x=14
x=5
|
(6)3×14+2x=98
2x=56
x=28
|