Question

x+y=7and 2x-3y=9bsolve it by substitute
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Answer 1

Answer:

Step-by-step explanation:Answer:

2x+2y=7

2x-3y=9

then,

y=2

x=5

by elimination method

Answer 2

Answer:

x + y = 7.....1

2x - 3y = 9....2

x = 7 - y

sub. the value of X in eq. 2

2(7-y) - 3y = 9

14 - 2y - 3y = 9

14 -5y = 9

-5y = 9 - 14

- 5y = - 5

y = 1

therefore , value of X = 7 - 1 ( sub the value of y )

x = 6 .

so.....

x = 6

y = 1 .