Hello :
<span>7x-2y=1 ...(1)
2y=x-1...(2)
</span><span>substitution 2y in (1) :
</span>7x-(x-1) = 1
7x-x+1 = 1
7x = 0
x=0
in (2) : 2y = 0-1
2y = -1 y= -1/2
the <span>system have one solution : (0 ;-1/2)</span>
Answer:
Oh my gosh!
Step-by-step explanation:
Good job, nice!
Answer:
d(3d-10)
Step-by-step explanation:
You pull out the common factor of d from both terms, and group the remaining terms inside a parenthesis.
<span>f x=0 ==>x^4+400=0+400=400</span>
Answer:
x=4.34 seconds
Step-by-step explanation:
-16x^2+70x-2=0
x=4.34
