Question

y = 4x + 7
y = -3x - 21

Answer 1

Answer:

x = 2 and y = 15

Step-by-step explanation:

So, we have the given system of equations as:

y = 4x + 7

y = -3x + 21

Now, we can solve it graphically too, but here we solve it using elimination.

For this, we need to have either of the coefficients matched

Thus,

multiplying by 3 -> 3y = 12x + 21

multiplying by 4 -> 4y = -12x + 84

adding these 2 equations,

7y = 0x + 105

y = 105/7

y = 15

Sub y = 35 in either of equation

15 = 4x + 7

4x = 8

x = 2

Thus, x = 2 and y = 15 are the solutions to the given system of equations

Answer 2

Answer:

2 ,15 are value hope it helps you