Answer:
A = –3
B = 7
Step-by-step explanation:
Please see attached photo for explanation.
4x+8x+12x+16x=5+10+30+40
4x+8x+12x+16x= 85
40x=85
x= 85/40
x=2.125
c
3/7
21w - 21 = -12
21w = -12 +21
21w = 9
w = 9/21
i.e w= 3/7