SOLUTION: Solve the question by the method of elimination by substitution :- Question :- 3x-4y=20 x+2y=5

SOLUTION: Solve the question by the method of elimination by substitution :- Question :- 3x-4y=20 x+2y=5

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Question 370032: Solve the question by the method of elimination by substitution :-
Question :-
3x-4y=20
x+2y=5
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Substitution or elimination?
.
.
Substitution:
1.
2.
From eq. 2,

Substitute into eq. 1,

Then from eq. 2,

.
.
.
Elimination:
1.
2.
Multiply eq. 2 by (2) and add to eq. 1,

Then use either equation to solve for .

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