Answer $0.75
Step-by-step explanation:
3a + 4b = 4.85
3a + 10b = 8.75
Both equations have 3a therefore we can isolate 3a in each equation.
Now:
3a = 4.85 - 4b and 3a = 8.75 - 10b
If 3a each equal different values we now set those values equal and solve for b.
4.85 - 4b = 8.75 - 10b
6b = 3.90
6b/6 = 3.90/6
b = 0.65
Now substitute this into the first equation to solve for a.
3a = 4.85 - 4b
3a = 4.85 - 4(0.65)
3a = 4.85 - 2.60
3a = 2.25
3a/3 = 2.25/3
a = 0.75
