Answer: F=140
Step-by-step explanation:
720=(x-60)+(x-40)+(x-20)+130+120+110
720-130-120-110=3x-120
360=3x-120
360+120=3x
480=3x
480/3=x
160=x
F=160-20
Next problem
102+31+x=180
133+x=180
x=180-133
x=47

We know that y=7x, so we just need tu put it into the 1st equation

So we found x. Now we can find y

Answer:
x=1, y=7; or (1;7)
Answer:
1. -5y + 2y = -3y
2. -8r - 16 + 6r - 12
3. -8r - -16 + 6r - 12
4. -8r - -16 + 6r - 12
5. 2m +13
Step-by-step explanation:
why is there 2 of the same
Answer:there is no solution
Step-by-step explanation:
Answer: z = -2
Step-by-step explanation:
6z + 10 = -2
add 10 on both sides
6z = -2 -10
6z = - 12
divide 6 on both sides
z = -2