Solve simultaneously y=3x+4 and 13x+4y=10

Find the values for x and y by solving the equations simultaneously
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1 Answer

y = 3x + 4

13x + 4y = 10

.

3x - y = -4

13x + 4y = 10

.

12x - 4y = -16

13x + 4y = 10

add the equations

.

25x + 0y = -6

x = -6/25

13(-6/25) + 4y = 10

-78/25 + 4y = 10

4y = 250/10 + 78/10

4y = 328/10

y = 82/10

y = 41/5

Answer:  x = -6/25, y = 41/5
by Level 13 User (103k points)

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