Test: Linear equations II - Normal

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Question 1:   Is the number   8   the root of the equation   25−x=19
Yes
Yes, when   x>0
Yes, when   x<0
No
Question 2:   Is the number   10   the root of the equation   10y=100  ?
Yes
Yes, when   x>0
No
Yes, when   x<0
Question 3:   Solve the equation   15x=0
1
0
10
−1
Question 4:   Solve the equation   28x=112
4
−4
0
1
Question 5:   When   x   is double it is equal to   217  .  Find   x  .
1.085
10.85
1085
108.5
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