The simultaneous linear equations are 3x + 4y = 11 and 4x + 3y = 10
x+y=?
x-y=?
find the value of x and y
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Answer:
3x+4y = 11 _ _ _ _(i)
4x+3y = 10_ _ _ _(ii)
multiply 4 in (I) and 3 in (ii)
12x+16y = 44
12x+9y = 30
7y = 14
y = 2
put this value of y in (i)
3x+(4×2) = 11
3x = 3
x. = 1
hence x+y = 1+2
= 3
x-y = 1-2
= -1
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