Idon't know how to solve this linear equation by substitution the equation is.
-5x + 3y = 51
y = 10x - 8

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15