Marvin is making lemon bread and pumpkin bread for a school bake sale. He needs 4 1/4 cups of flour for the lemon bread and 1 1/2 times as much flour for the pumpkin bread. He only has 2 1/8 cups of flour left in his pantry, so he buys a new bag from the grocery store. How much flour will marvin use from the new bag?

Marvin will use 8 1/2 more cups of flour.

Step-by-step explanation:

To find the answer I, converted the amount of flour to decimals. (To make it easier.) Mulitiplied 4.25 by 1.5 and got 6.375. Then added 4.25 to 6.375 to get, 10.625. Subtracted it by 2.125 (2 1/8) and got 8.5 cups of flour.

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.