Stefkobazzid
Stefkobazzid
Mathematics
Answered
7x + 5y = 29
21x - 25y = -33
Sagot :
Konrad509id
Konrad509id
[tex]7x + 5y = 29|\cdot5\\ 21x - 25y = -33\\\\ 35x+25y=145\\ \underline{21x-25y=-33}\\ 56x=112\\ x=2\\\\ 7\cdot2+5y=29\\ 14+5y=29\\ 5y=15\\ y=3\\\\ \boxed{(x,y)=(2,3)} [/tex]
Answer Link
Anijlinid
Anijlinid
5*(7x + 5y = 29)
+ 21x - 25y = -33
35x + 25y = 145
+ 21x - 25y = -33
56 x + 0y = 112
56x = 112
x = 2
Plug the x back in to the original equation to solve for y.
7x + 5y = 29
7(2) + 5y = 29
14 + 5y = 29
5y = 15
y = 3
21x - 25y = -33
21(2) - 25y = -33
42 - 25y = -33
-25y = -75
y = 3
x = 2 and y = 3
Answer Link
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