Angienava
Angienava
29-01-2018
Mathematics
contestada
How do you do this problem?
Respuesta :
prosborough198p2ub41
prosborough198p2ub41
29-01-2018
by substitution is how to solve
2x-3y=21
y=3-x
2x-3(3-x)=21
2x-9+3x=21
5x=30
x= 6
now substitute our x value into y=3-x
so we get
y=3-6 = -3
so x=6 and y=-3 hope this helps!!!!! Thank you!
Answer Link
mohk1112
mohk1112
29-01-2018
by the use of substitution:for x,
2x-3y=21 ;
will equal 2x-3 (3-x)=21
2x-9+3x=21
5x=30
x=6.
for y:
since y equals 3-x;
y=3-6=-3
Answer Link
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