2 X + Y =7;x-4y=10 linear equations in two variables
Answers
Answered by
0
Answer:
2x + y = 7 ...... (1)
x - 4y = 10....... (2)
multiply equation (2) by 2
2x - 8y = 20......(3)
subtracting equation (3) from (1)
0 + 9y = -13
y = -13/9
put the value of y in equation (1)
2x + y = 7
2x + (-13/9) = 7
2x - 13/9 = 7
2x = 7 + 13/9
2x = 76/9
x = 76/ 9x2
x = 38/9
coordinates are (38/2, -13/9)
please follow me and mark as brainliest
Similar questions