Answer:x=-7
Step-by-step explanation:
The other number is 5 less than 3 times the other so the other number will be
3x-5
We are given that they add up to 31, so we can write
x+(3x-5) = 31
4x - 5 =31
Answer:
We need 1 cup of sugar for 2 cups of bananas
Step-by-step explanation:
We can use proportions to solve this problem. Put bananas on the top and sugar on the bottom
3 cups 2 cups bananas
-------------- = ------------------
1 1/2 cups x cups sugar
Using cross products
3 *x = 2 * 1 1/2
Changing to decimals
3x = 2* 1.5
3x = 3
Divide by 3
3x/3 = 3/3
x=1
We need 1 cup of sugar for 2 cups of bananas
