Answer:
in step 4
Step-by-step explanation:
we have

so step 1 is correct
step 2

so step 2 is correct
step 3

so step 3 is correct
step 4

so step 4 is incorrect
Answer:
-12
Step-by-step explanation:
-12 + 17 is 5. x = 5
4x-5y=3
4x-5(10)=3
4x-50=3
+50 +50
4x=53
/4 /4
x=53/4
3:2, easy.
the rest you dont need to read i just need 20 characters to "explain it well".
Answer:

Step-by-step explanation:

<em>Replace it with y</em>

<em>Exchange the values of x and y</em>

<em>Solve for y</em>

<em>Subtracting 1 from both sides</em>

<em>Dividing both sides by 2</em>

<em>Replace it by </em>
So,
