Answer:
$48
Step-by-step explanation:
If all their accounts added together equal $148, take the equations in their balances and add them together and set them equal to $148.
s + 2(s+3) + 4s-5 = 148
Simplify the equation: s + 2s +6 + 4s - 5 = 148
More simplified: 7s + 1 = 148
Get s by itself by subtracting the 1 from both side then dividing both sides by 7 and you get that s = 21.
Now plug 21 into the equation for Petros's account.
2(21+3) = 2(24) = 48
Petros has $48 in his account.
