# Algebra

posted by .

Solve using the substitution method.
0.3x+0.2y=5,0.5x+0.4y=11

• Algebra -

I would multiply each equation by 10 to get rid of those decimals

3x + 2y = 50 ---> 2y = 50-3x
5x + 4y = 110

sub 2y= 50-3x into the 2nd

5x + 2(50-3x) = 110
5x + 100 - 6x = 110
-x = 10
x = -10

into 2y = 50-3x = 50-3(-10)
2y = 80
y = 40

x = -10, y = 40

## Similar Questions

1. ### Substitution Method-Plz help

Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=-4 (y+2) + y = -4 solve for y. Then, x= y+2 i don't get it.How …
2. ### algebra

using the substitution method how do you solve y=-1/3x y+2x=5
3. ### algebra

Solve using the substitution method 6x-3y=18, 6x+3y=-12
4. ### Algebra

4x+y=42 6x-5y=50 Solve using the substitution method.
5. ### Algebra

x-2y=.9 4x-3y=13.1 Solve using the substitution method.
6. ### Algebra

Solve using substitution method 3x+8y=20 x=24-7y
7. ### Algebra 1

bobpursey, In this problem you helped me with earlier: Solve using any appropriate method. y = 2× - 5, y = ½× + 1 Substitution, substitute for y. 2×-5=½ × + 1 3/2 x=6 x=4 y= 2*4-5=3 How did you choose which method you were going …
8. ### Algebra Help!!

solve using the substitution method. y= 5 - 3x 4x + y= 7
9. ### Algebra

If 2x + 2y = 20 & 5x - 3y = 15 Solve using the substitution method.
10. ### Algebra

solve using substitution method: 4x+5y=21 x=48-6y

More Similar Questions