5x+2x-3y+y = (5+2)x+(-3+1)y = 7x - 2y
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It is 5xy + 5x.
To simplify Y plus Y, you can combine the like terms. In this case, both Y terms are like terms because they have the same variable. When you add them together, you get 2Y. Therefore, Y plus Y simplifies to 2Y.
11x+2y+9 is the final answer.
It is slope intercept form. The equation for slope intercept form is y=mx+b which is like your equation y=5x+6
Add: 5x - y + x + y + 8 + 10 ie 6x = 18 so x = 3 and y = 7