4x+3y=3
y=2x+8
8x+9y=111
y=x+1
2007-05-30 06:08:49 · 3 answers · asked by Marcus M 1 in Science & Mathematics ➔ Mathematics
All you have to do is rewrite these equations to put the variables on one side of the equation and the numerical value on the other. Then solve by elimination or substitution
4x + 3y = 3
2x - y = -8
Multiply second equation by 3:
4x + 3y = 3
6x - 3y = -24
Add:
10x = -21
Solve:
x = -2.1
Solve for y:
y = 2(-2.1) + 8
y = 3.8
Check:
4(-2.1) + 3(3.8) = 3
-8.4 + 11.4 = 3
3 = 3
Check!
2007-05-30 06:13:02 · answer #1 · answered by dogsafire 7 · 1⤊ 0⤋
1.
4x+3(2x+8)=3
10x=-21
x=-2.1
y=-4.2+8
3.8
in the same way you can solve the second one.
2007-05-30 13:14:43 · answer #2 · answered by ram kumar 2 · 0⤊ 0⤋
1) x= -2.1
y= 3.8
2) x= 6
y= 7
2007-05-30 13:21:24 · answer #3 · answered by Marty B 2 · 0⤊ 0⤋