the following pair of equation by using substitution method 3x-7y=1 and x-y=-1
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Should I find the value of x and Y?
manadasap9j44n:
should I find the value of x and y
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3x-7y=1 .................................(1)
x-y=-1 ................................(2)
multiplying by 7 to equation (2)
(x-y=-1)7
7x-7y=-7 .................................(3)
add eq (1),(3)
3x-7y=1
+
7x*7y=-7
-------------
10x =-6
x=-6/10
x=-3/5
x= -0.6
please the value of x in eq (2)
x-y=-1
-0.6-y=-1
-y=-1+0.6
-y=-0.5
∴y= 0.5
x-y=-1 ................................(2)
multiplying by 7 to equation (2)
(x-y=-1)7
7x-7y=-7 .................................(3)
add eq (1),(3)
3x-7y=1
+
7x*7y=-7
-------------
10x =-6
x=-6/10
x=-3/5
x= -0.6
please the value of x in eq (2)
x-y=-1
-0.6-y=-1
-y=-1+0.6
-y=-0.5
∴y= 0.5
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