Question

for the following system, if you isolate x in the second equation to use the substitution method, in the first equation?
3x +y =8
-x - y = -7

Answer 1

-y+7
-y-7
y+7
y-7

Answer 2

-y+7 because you would have to add y to the other side and then divide both sides by -1!

Answer 3

dallas solved the system of equations below. what mistake did he make in his work?
3x + y=6
x - 2y =2

y=6-3x
x-2 (6-3x)=2
x-12+6x=2
5x-12=2
+12 +12
5x-5 =14/5
x=2.8
3(2.8)+y=6
8.4+y=6
-8.4 -8.4
y=-2.4

Answer 4

it should be 7x-12 on the 4th step!

Answer 5

he combined like terms incorrectly. it should have been 7x instead od 5x.

Answer 6

right?

Answer 7

so x should equal 2 and y should equal 0 and yes you are correct!

Answer 8

carrol high school has a total of 94 boys and girls who play sports. if the number of boys is 9 more than four times the number of girls, how many boys play sports at this high school?

Answer 9

@Golferguy158

Answer 10

your equation will be 94=4x +x +9 so you will get that there is 17 woman who play sports and 77 boys

Answer 11

solve the following system.
y= x +4
5x +y =16

Answer 12

@Golferguy158