Answer:
38
Step-by-step explanation:
8+17=25 25=8x3. His current age is 8 so 8+30=38
x = 8, y = 2
Multiply the second equation by -2:
x + 6y = 20
-2x - 6y = -28
Add the equations and simplify:
-x = -8
x = 8
Plug x = 8 back into the first equation and solve for y:
8 + 6y = 20
6y = 12
y = 2
x = ⁶/₅
if 70% of the orice is 420 then
70x = 100 × 420
70x = 42000
x = 42000/70
x = 600
This would be displayed as
3x/5
