solve:5x+3y=-11 ; 2x+4y=-10
Answers
Step-by-step explanation:
5x+3y = - 11 1st equation
2x+4y = - 10 2nd equation
1st equation is multiple by 2 and 2nd equation is multiple by 5 by eliminating method and eliminate x so that u will get the value of y and x
10 x +6 y = - 22
10 x + 20y = - 50
(-) (-). (+)
-14 y = 28
y = 28/-14
y= - 2
Substitute y = -2 in eq 1 u can substitute in both 1 st and 2nd equation u will get same answer
I am substituting in 2 nd equation
2x +4 ( -2 ) = - 10
2 x - 8 = - 10
2x = - 10 +8
2x = - 2
x = -2/2
x= -1
Therefore x = -1 ; y = -2
If u had any doubt u can ask u will write in note and I will send
Answer:
5x+3y=11-----(1)
2x+4y= -10------(2)
multiplying eqn 1 by 2 and eqn 2 by 5
10x+6y=22---------(3)
10x+20y= -50-----(4)
subtracting eqn (3) from eqn (4)
10x+20y= -50
10x+ 6y= 22
(-) (-). (-)
-----------------------
14y = -72
y = -72/14
y = -5.14
put y = -5.14in equation 2
2x+4×-5.14= -10
2x -20.56 = -10
2x. = -10+20.56
2x. = 10.56
x. =10.56/2
x. =5.28
hope this is helpful for you