Step-by-step explanation:
that normally means we want to add our subtract a certain of the 2 equations, so that we are led with one summary equation with only one variable.
the easiest way here is possibly to multiply the second equation by 5 (to get also 10y) and then subtract it from the first equation :
3x + 10y = -4
- 10x + 10y = 10
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-7x + 0 = -14
7x = 14
x = 2
2x + 2y = 2
gives us then
2×2 + 2y = 2
4 + 2y = 2
2y = -2
y = -1
x = 2
y = -1
