Question 1126673
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Solve by substitution.<br>
The first equation says that "y-1" is the same as "x".  So replace "x" with "y-1" in the second equation.  That gives you an equation in only y, allowing you to solve the problem with basic algebra.<br>
{{{5(y-1) = 10y}}}<br>
You can solve from there.<br>
It's a simple example of how the method of substitution is used to solve pairs of equations in two variables.