# math

solve using substitution

3x-4y=-5
x=y+2
HELP Me.!

1. 👍
2. 👎
3. 👁
1. This one is easy. x is already expressed in terms of y in the second equation. You only have to replace the x in the forst equation with the expression from the second equation. You get that:

3*(y+2)-4y=-5
=>3y+6-4y=-5
=>6-y=-5
=>y=11

When we place this value for y in the second equation, we find that

x=11+2=13

So, y=11 and x=13

1. 👍
2. 👎

## Similar Questions

1. ### How do I do this.?(Math.)

Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve one of the equations for x or y. Let's solve the first one for y: y - 2x = -5 y = 2x - 5 Now let's substitute 2x - 5 for y in the second

2. ### Help please math

Solve using substitution. y = x – 2 x + y = 10 7x + 2y = - 8 8y = 4x Solve using elimination. 2x + 3y = 12 2x – y = 4 5x – 2y = - 19 2x + 3y = 0

3. ### Algebra PLEASE HELP!!

What advantages does the method of substitution have over graphing for solving systems of equations? Choose the correct answer below. A. Graphing cannot be used to solve dependent or inconsistent systems due to the nature of the

4. ### math

What is the first step in solving the linear system {2x−3y=11 {−x+5y=−9 by the substitution method in the most efficient way? A. Solve the first equation for x. B. Solve the first equation for y. C. Solve the second equation

1. ### math

What is the first step in solving the linear system {2x − 3y = 11 {−x + 5y = −9 by the substitution method in the most efficient way? A. Solve the first equation for x. B. Solve the first equation for y. C. Solve the second

2. ### Algebra 2

Solve by Substitution x + 2y + z = 14 y = z + 1 x = -3z + 6

3. ### Intermediate algebra

5x - 2y = -62 -9x - 5y = 60 Solve by substitution

4. ### Algebra

Solve the system of equations using substitution. x + 4y = -5 3x - 8y = 45 When I tried to solve it, I got x=-17 and y=-3. When I plugged these into the first equation, it didn't work out at all. Could someone please show me the

1. ### Microeconomics

1. The utility function is given by: U=x+y and the budget line is x+2y=100. Then the price of good x goes up to 4. Find the Hicksian substitution effect, income effect, and total change in demand for good x from the change --- Ok

2. ### math

solve using substitution y=4x-8 y=2x+10

3. ### math

solve by substitution 7x-2y=35 x-4y=5 2x+y=9 8x+4y=36

4. ### Algebra

Solve using substitution 5x-2y= 0 and 3x=y =-1