3 years ago

If 15x + 12y = 90 then 5x + 4y = ?

Mathematics

2 answers:

vivado [14]3 years ago

8 0

Answer:

Step-by-step explanation:

this is common sense

15x + 12y = 90

dividing throughout by 3, we would have

5x + 4y = 30

by equating

15x + 12y - 90=5x + 4y -30

15x -5x = 4y -12y -30 + 90

10x=60-8y

dividing throughout by 2

5x= 30-4y

5x+4y= 30

Lunna [17]3 years ago

5 0

Answer:

Step-by-step explanation:

15x+12y=90

Divide by 3

5x+4y=30

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