Answer:
(4, 2 )
Step-by-step explanation:
Given the 2 equations
3x + y = 14 → (1)
7x - 4y = 20 → (2)
Rearrange (1) making y the subject by subtracting 3x from both sides
y = 14 - 3x → (3)
Substitute y = 14 - 3x into (2)
7x - 4(14 - 3x) = 20 ← distribute parenthesis and simplify left side
7x - 56 + 12x = 20
19x - 56 = 20 ( add 56 to both sides )
19x = 76 ( divide both sides by 19 )
x = 4
Substitute x = 4 into (3) for corresponding value of y
y = 14 - 3(4) = 14 - 12 = 2
solution is (4, 2 )
Answer: I don't see what your talking about here, so I can't help you.
Step-by-step explanation:
Isolate for each variable.
1. z= 6 - 10
z= -4
2. y= 48/8
y=6
3. q= 1+12
q= 13
4. 18 x 2= a
36= a
5. r= 7 x 3
r= 21
I think you can try the rest :)
1.
1/4 is less then 2/4 or 1/2so if the denominator is equal it will be easier to multiply
