Question

Q1.Two sandwiches and a juice cost $3.40. Four sandwiches and three juices cost $ 7.20. What
is the cost of a juice? Solve by using substitution method

Answer 1

Hey mate thank for the question

Hope it helps

Let the cost of 1 sandwiches be x and cost of 1 juice be y

ATP=>

2x+y=3.40

y=3.40-2x ----------(1)

ATP=>

4x+3y=7.20 ----------(2)

putting the value of y in eq (2)

4x+3(3.40-2x)=7.20

4x+10.20-6x=7.20

10.20-2x=7.20

10.20-7.20=2x

3=2x

3/2=x

putting the value of x in eq (1)

y=3.40-2×3/2

y=3.40-3

y=0.4

So the cost of juice is $0.4