Answer:
This system has infinite solutions and it would be much easier to solve it by elimination but substitution it is.
Step-by-step explanation:
-3x+3y=9
-x+y=3
Isolate either x or y in any of the equations. I'll go with the second.
y = 3+x
Now substitute this for y in the first equation.
-3x+3(3+x)=9
Distribute the 3
-3x+9+3x=9
Combine like terms:
9=9
0=0
It's infinite
Answer:
There's only 1 step. It is the second one, "Multiply 4 by 5 and multiply 4 by 3x"
Step-by-step explanation:
4(5 - 3x) =
4(5) - 4(3x) =
20 - 12x
You can't simplify further, so the second one is the right answer
Hope this helps! :)
Answer:
68+4x
-0.3+0.3y
11m + 1n
72 - 12a + 72a
1 3/4h + h/10
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
Factor the numerators/ denominators where possible
x² + 7x + 10 = (x+ 2)(x + 5)
x² - 3x - 18 = (x - 6)(x + 3)
x² + x - 2 = (x + 2)(x - 1)
Hence
= ×
Cancel the factors (x + 2) and (x + 3) on numerator/denominator
= ← in simplest form
The denominator of the product cannot be zero as this would make it undefined. Equating the denominator to zero and solving gives the value that x cannot be.
solve x - 1 = 0 ⇒ x = 1 ← restricted value
3.057.02 is your answer to this question.