Question

Solve x-3y-7=0 and 3x-3y-15=0 by substitution method​

Answer 1

Answer: x = 4 and y = 1. Step-by-step explanation: Step-by-step explanation: Given : To Find : solve it by cross multiplication method

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Answer 2

Answer:

x = 4

y = -1

Step-by-step explanation:

x - 3y = 7

x = 7 + 3y

Sub x = 3y + 7 in 3x - 3y - 15 = 0

3x - 3y = 15

x - y = 5

3y + 7 - y = 5

2y = -2

y = -1

Therefore,

x = 7 - 3 = 4

x = 4

y = -1