Question

solve the system of equations using substitution 3y=-1/2x+2
y=-x+9

Answer 1

Step One: Isolate a Variable of your choice in either of the equations
Step Two: Plug in that variable.
Step 3: Solve for the variable.

3(-x+9) = -1/2x + 2
-3x + 27 = -1/2 + 2
-2.5x = 25
x = -10

Step 3: Input the variable back into either of the equations.

y = -(-10) + 9
y = 10 + 9
y = 19

Answer 2

I dont have any choices as those answers

Answer 3

@xGuardians

Answer 4

Tell me your choices.

Answer 5

they are
(3,6)
(-1,8)
(20,-4)
(10,-1)

Answer 6

Bah messed up on my arithmetic haha, one second.

Answer 7

no worries

Answer 8

Step One: Isolate a Variable of your choice in either of the equations
Step Two: Plug in that variable.
Step 3: Solve for the variable.

3(-x+9) = -1/2x + 2
-3x + 27 = -1/2 + 2
-2.5x = -25
x = 10

Step 3: Input the variable back into either of the equations.

y = -(10) + 9
y = -10 + 9
y = 1

(10,-1) is the answer, this is why you should always double check :P

Answer 9

Thank you!