Question

1. The equation 2x - y = - 7 can also be written as l = 2x + 7

Answer 1

Answer:

2x + y = 7

Step-by-step explanation:

Given equation is:

2x+y=7

For x = - 1, we get

−2+y=7

⇒y=9

∴ (-1, 9) is a solution.

For x = 0, we get

⇒0+y=7

⇒y=7

∴ (0, 7) is a solution.

For x = 1, we get

⇒2+y=7

⇒y=5

∴ (1, 5) is a solution.

For x = 2, we get

⇒4+y=7

⇒y=3

∴ (2, 3) is a solution.

Hence, we have four solution (−1,9),(0,7),(1,5)and(2,3)

Answer 2

Given equation,

$2x-y=-7$

This equation can also be written as $y=2x+7$

This can be done by changing terms.

$2x-y=-7$

$2x=y-7$

$2x+7=y$

$y=2x+7$

Therefore, the equation $2x-y=-7$ can also be written as $y=2x+7$