Answer:
see explanation
Step-by-step explanation:
Given the 2 equations
5x + y = 21 → (1)
x - 3y = 9 → (2)
Multiply (1) by 3 and add the result to (2) to eliminate y term
15x + 3y = 63 → (3)
Add (2) and (3) term by term
(x + 15x) + )- 3y + 3y) = (9 + 63)
16x = 72 ( divide both sides by 16 )
x = 4.5
Substitute x = 4.5 into (1) for corresponding value of y
22.5 + y = 21 ( subtract 22.5 from both sides )
y = - 1.5
Solution is (4.5, - 1.5 )
Answer:
Step-by-step explanation:
Easy way to do this is;
1
8 _
2
8 * 2 = 16
16 + 1 = 17
17/2 = 8 , 1/2
2(x+6)=x(x+1)
2x+12=x^2+x
x^2-x-12=0
(x-4)(x+3)=0
x-4=0
x=4
x+3=0
x=-3
Answer:
Thnx Bro
U to
Step-by-step explanation:
