The browser which is used for posting questions is almost useless for mathematical questions since it removes almost all mathematical symbols. As a result, all we can see of your question is 9 4x17
There is, therefore, no indication about the operator (if any) between 4x and 17.
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Since the second equation is already solved for "y", you can replace "y" by "9" in the other equation. Then solve the new equation for "x".
63
h is equal to 1 in that equation.
The answer to 9 times 7 equals 63. This is taught in math class.
h/9=7 multiply both sides by 9 h=63