Answer:
y = 0
x = 2
Explanation:
1. first you have to solve for (x), so take 10y+4=2x and divide by 2 (to isolate the variable). this gives the equation x = 5y + 4
2. now that you have an equation for x, you can substitute that into the top equation: -14 = -20y - 7 (5y+2)
3. now, distribute the 7: -14 = -20y -35y -14
4. combine like terms: -14 = -55y - 14
5. move the -14 on the left to the right: 0 = -55y (because adding 14 to each side cancels both out)
6. now isolate (y): 0/-55 = y, and 0/x is always 0, so y=0
7. by filling in (0) as y in the second equation, you get 10(0) + 4 = 2x, which ultimately gives the answer of x=2
you can check that its correct as well by doing -14 = -20(0)-7(2), which is true
hope this helped!