2(x- 12)=x
(2x-24)=x
2x-24=x
2x-x=24
x=24
2. Solution: Suppose X tons are shipped on the first day. Countable equation, get:
2.5x+x= 140
3.5x= 140
x=40
3. In the 1 th equation, x is a number.
In the second formula, x is the number B.
In the third formula, x is a number.
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