Answer:
3.3
Step-by-step explanation:
Hour : H
subtract the 75 from both sidesso the variable would be on one side and the knowns would be on the other side
45H + 75 = 225
-75 -75
Divide by 45 from both sides
45H = 150
÷45 ÷45
3.33
x = 4
3 + x = 7 ( isolate x by subtracting 3 from both sides )
x = 7 - 3 = 4
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