13x + 7x - 4x = -40
combine like terms o0n the left
16x = -40
divide both sides by 16
x = -5/2 or -2.5
Answer:
12.571 length
x= 1.8571 or 13/7
Step-by-step explanation:
Answer:
i think its d :both a and b
Step-by-step explanation:
i think
Subtract 17 from both sides , x=1
S= 169
37+s+s=375
37+2s=375
Subtract 37 from both sides
2s=338
Divide by 2 on both sides
S=169