3.
и 3х – 4y = 10 ; 4х + Зу = 5 solve using eleimination
Answers
Answer:
x = 2 and Y = - 1
Step-by-step explanation:
3x-4y = 10
4x+3y= 5
By elimination method
multiply 4(3х – 4y = 10 )
multiply 3(4х + Зу = 5 )
We did this in order to equalize one if the number of both the equations
thus; 12x-16y = 40
-
12x+9y = 15
+ - (change the signs)
-25y = 25
y = -1
substitute value of y = -1 in any equation of these 2
3x -4 × (-1) = 10
3x +4 = 10
3x = 10 - 4
3x = 6
x = 6/3
x = 2
THUS ; X = 2 AND Y = - 1