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What value of 
z makes the equation below true?

10 z+5=75
7
10
11
15

What value of z z makes the equation below true?\newline10z+5=75 10 z+5=75 \newline77\newline1010\newline1111\newline1515

Full solution

Q. What value of z z makes the equation below true?\newline10z+5=75 10 z+5=75 \newline77\newline1010\newline1111\newline1515
  1. Subtract 55 from both sides: We need to solve the equation for z. Start by subtracting 55 from both sides of the equation to isolate the term with z.\newline10z+55=75510z + 5 - 5 = 75 - 5
  2. Isolate term with zz: After subtracting 55 from both sides, we get: 10z=7010z = 70
  3. Divide by 1010: Now, divide both sides of the equation by 1010 to solve for zz.10z10=7010\frac{10z}{10} = \frac{70}{10}
  4. Find value of z: After dividing by 1010, we find the value of zz:z=7z = 7

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