Answer:
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Step-by-step explanation:
Answer:

Step-by-step explanation:
The correct steps to solve the equation are:


Because 
So, solving we get:

Sum 3 on every side:

Dividing by 2 into both sides:

So, the answer is 
Answer:
45 cubes
Step-by-step explanation:
There are 10 cubes in each 1. so 10 x 4 = 40. 1/2 of 10 is 5 so 40+5 = 45.