Question

What is the solution to the equation 7.5z−3=10.5 ?

Answer 1

z = 1.8

Explanation:

What is the solution to the equation 7.5z−3=10.5?

7.5z - 3 = 10.5

7.5z = 13.5

z = 13.5 : 7.5

z = 1.8

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check

7.5 * 1.8 - 3 = 10.5

13.5 - 3 = 10.5

10.5 = 10.5

the answer is good

Answer 2

Combine multiplied terms into a single fraction

`7.5z - 3 = 10.5`

`(15z)/(2) - 3 = 10.5`

Find common denominator

`(15z)/(2) - 3 = 10.5`

`(15z)/(2) + (2( - 3))/(2) = 10.5`

Combine fractions with common denominator

`(15z)/(2) + (2( - 3))/(2) = 10.5`

`(5z + 2( - 3))/(2) = 10.5`

`z = 1.8`