FancyUsername you are my favourite math expert. Just saying XD

7x+4y=39
2x+4y=14
A. (5, 4)
B. (3, 4)
C. (3, 2)
D. (5, 1)

I really hope the next exam is a bit different and easy so I may know how to do it and I won't be asking so many questions. XD

Question

FancyUsername you are my favourite math expert. Just saying XD

7x+4y=39
2x+4y=14
A. (5, 4)
B. (3, 4)
C. (3, 2)
D. (5, 1)

I really hope the next exam is a bit different and easy so I may know how to do it and I won't be asking so many questions. XD

anonymous · Answer

you use the elimination method.
and substract those equations.
5x = 25
x = 25/5 = 5
2 * 5 + 4y = 14
4y = 14 - 10 = 4
y = 1
check:
7 * 5 + 4 = 39
35 + 4 = 39
39 = 39
Variant D(5 1)