solve the following simultaneous equations in substitution or elimation method
Answers
Answer:
Easiest question ever!!
x = 6
y = 1
Step-by-step explanation:
2x - 3y = 9 ------- (i)
2x + y = 13 ------- (ii)
Using Elimination method,
Subtract (i) - (ii)
2x - 3y - (2x + y) = 9 - 13
2x - 3y - 2x - y = -4
-4y = -4
y = -4/-4
y = 1
2x + y = 13
2x + 1 = 13
2x = 12
x = 12/2
x = 6
Using Substitution Method,
2x + y = 13
y = 13 - 2x ------- (iii)
Putting (iii) in (i),
2x - 3y = 9
2x - 3(13 - 2x) = 9
2x - 39 + 6x = 9
8x = 48
x = 48/8
x = 6
y = 13 - 2x
y = 13 - 2(6)
y = 13 - 12
y = 1
Answer:
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Step-by-step explanation:
2x - 3y - (2x + y) = 9 - 13
2x - 3y - 2x - y = -4
-4y = -4
y = -4/-4
y = 1
2x + y = 13
2x + 1 = 13
2x = 12
x = 12/2
x = 6
OROR
Using Substitution Method,
2x + y = 13
y = 13 - 2x ------- (iii)
Putting (iii) in (i),
2x - 3y = 9
2x - 3(13 - 2x) = 9
2x - 39 + 6x = 9
8x = 48
x = 48/8
x = 6
y = 13 - 2x
y = 13 - 2(6)
y = 13 - 12
y = 1