Answer: Two equivalent ratios form a proportion. Equivalent ratios have the same value.
Ignore this post, I have no Idea what it is, report this so it gets taken down so someone else can answer...
Answer:
1)you find the least prime factors of each number
2)Multiply those factors both numbers have in common. If there are no common prime factors, the GCF is 1
We are given the equation:
cy – 7 = 5d
And we are asked to find for y.
First step, add 7 on both sides:
cy – 7 + 7 = 5d + 7
cy = 5d + 7
Next step, divide both sides by c:
cy / c = (5d + 7) / c
<span>y = (5d + 7) / c</span>
It takes 250 g of pasta and 240 ml of sauce to make one batch of spaghetti and it takes 600g of pasta and 700ml of sauce to make one batch of lasagna.
Case 1: Pasta
The chef wants to make spaghetti and lasagna using more than 4000 g of pasta.
S denote the number of batches of spaghetti he makes and L the number of batches of lasagna he makes.
So the equation becomes :

Case 2: Sauce
chef wants to make spaghetti and lasagna using more than 5000 ml of sauce.
S denote the number of batches of spaghetti he makes and L the number of batches of lasagna he makes.
So the equation becomes:
Answer :
The two equations are :
For pasta: 
For sauce: