Question

Solve this simultaneous equation
3x+4y= 7, 3x - 4y = -1​

Answer 1

Step-by-step explanation:

3x+ 4y = 7

3x - 4y = -1

___________

6x = 6

x = 1

put in equation

3x+4y= 7

3×1+4y=7

3+4y=7

4y=7-3

4y=4

y=1

Answer 2

Answer:

3x+4y=7→→→1

3x-4y=-1→→→2

Add both the equation than,

6x=6

x=1

substitute x=1 in equation →→→1

3+4y=7

4y=4y

y=1