28 !!!
Why because you multiply x which is 2
There are 2 ways to do this with elimination method. You can either multiply the first equation by 6 or the second equation by 2. I think multiplying by 2 is easier therefore that's the way I'm going to show you.
x-2y=3001️⃣
6x-y-95=0 -simplify> 6x-y=952️⃣
multiply both sides of second equation by 2 to make 2y and eliminate
2️⃣*2
12x-2y=1903️⃣
Now we can eliminate!
3️⃣-1️⃣
12x-2y-(x-2y)=190-300
11x=-110
x=-10
Now substitute this back into either of the equations.
-10-2y=300
2y=-10-300
y=-155
So we get answers
x=-10
y=-155
Now check our work:
-10- 2*-155=-10+310=300 Correct!
6*-10- -155-95=155-95-60=60-60=0 Correct!
I really hope this helped you and if you have any more question about a step in how I got the answer, you can always ask in the comments and I will come answer whenever I see it!
Answer:
x=16
Step-by-step explanation:
If the triangles are similar then their sides are in proportion.
Set the proportions 20/(3x+8)=(x-1)/(x-1+27)
solve for x,
cross multiply
20(x+26)=(x-1)(3x+8),
distribute
20x+520= 3x² +8x-3x-8,
combine like terms
3x²-15x-528=0
solve using quadratic formula
x=16 and x= -11 reject because we cannot have negative measurements
Answer is in the attachment below.