An algebraic expression is an expression built up from integer constants, variables, and the algebraic operations.
It is 8x-5 you replace the variable y with 3 in the expression
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After two hours the prices will meet a 760
$550+105=655 |655+105= 760
660+50= 710 |710+50= 760
They meet in the second hour so in the second hour they will charge the same.
5x = 4y - 3
Standard form is Ax + By = C, so first subtract 4y to both sides:
5x - 4y = -3
