Solve.
{y=x−7
5x+2y=7
Use the substitution method.
A.(3, −4)
B.(−1, −8)
C.(0, −7)
D.(7, 0)
Answers
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Heya !!
Given equations :- y=x-7 _(1) and 5x+2y=7 _(2)
Substituting y=x-7 in _(2)
5x+2(x-7)=7
5x+2x-14=7
7x=14+7
7x=21
x=21/7
x=3
Now, putting x=3 in _(1)
y=3-7
y= -4
Answer :- A. (3, -4)
Given equations :- y=x-7 _(1) and 5x+2y=7 _(2)
Substituting y=x-7 in _(2)
5x+2(x-7)=7
5x+2x-14=7
7x=14+7
7x=21
x=21/7
x=3
Now, putting x=3 in _(1)
y=3-7
y= -4
Answer :- A. (3, -4)
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