X = 28
you divide 112 by 4 to get 28
(20/4)×7
280÷(7+3)×7
175÷8=21.875(round off to 22 as no.of chairs cannot have decimal place)
First I would distribute 5(m+3) to get 5m+15
7m+9 < 5m +15
Then, subtract 9 from both sides.
7m<5m + 6
Subtract 5m from both sides.
2m<6
Divide both sides by 2.
m<3
Yeah I’m pretty sure you’re right
2x+4y=6
4×1=4
2×1=2
4+2=6
x is 1 y is 1
6y-2z=-2
6×1=6
6-8=-2
8/2=4
z is 4