Answer:
x=30
Step-by-step explanation:
0.7x=21
x=21/0.7
30
First we have to set up the equation
0.7x = 21
then to isolate x by itself you have to divide by 0.7
(0.7x)/(0.7)= (21)/(0.7)
The left side cancels and then 21/.07 = 30
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