Step-by-step explanation:
x+y=5
3x-2y+5=0
3x-2y= -5
x+y=5...... equation 1
3x-2y= -5....... equation 2
there fore make x the subject of the formula in equation 1
x=5-y.. equation 3
substitute equation three in equation 2
3(5-y)-2y=-5
15y-3y-2y=-5
10y=-5
divide both sides by 10
y=-5/10
y=-½
substitute y into equation 1
x+(-½)=5
x=5+½
x=5½
x=5½,y= -½
Answer:
Medium
Step-by-step explanation:
If a person that would need a little bit of a bigger size they would fit in medium and a small wouldnt fit them. Also a person that wears a small would also benefit because it would be a little bigger so if they grew more it would still fit.
4(5x-20)=-20
20x-80=-20
20x=60
x=3
X=-7
I'd be happy to help if you need an explanation:)
(x + 4) / 3 = 12.....multiply both sides by 3, cancelling the 3 on the left side
x + 4 = 12 * 3
x + 4 = 36
x = 36 - 4
x = 32
