Answer:
Simplifying
4x + -3y = 20
Solving
4x + -3y = 20
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '3y' to each side of the equation.
4x + -3y + 3y = 20 + 3y
Combine like terms: -3y + 3y = 0
4x + 0 = 20 + 3y
4x = 20 + 3y
Divide each side by '4'.
x = 5 + 0.75y
Simplifying
x = 5 + 0.75y
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Answer: There are 15 friends.
Step-by-step explanation:
We know that there is N friends (N is the number that we are looking for)
Each friend weights 1/20 ton.
Now, the weight of the N friends together is N times 1/20 ton.
Then we have:
N*(1/20) ton = 3/4 ton
We solve this for N.
First multiply both sides by 20.
20*N*(1/20) = N = 20*(3/4) = 60/4 = 15
Answer:the first one
Step-by-step explanation:
Answer:
x=2.080084
Step-by-step explanation: take cube root
