Y=x+4 and y=-2x-2 When they are equal it follows that y=y at that point as well so we can say:
x+4=-2x-2 add 2x to both sides
3x+4=-2 subtract 4 from both sides
3x=-6 divide both sides by 3
x=-2, now we can use this value in either original equation to solve for y.
y=2
Answer:(question8 x=28),(question9 x=18),(question10 x=22),(question11 x=45)
Step-by-step explanation:
Question 8
2x+1+33=90
2x+34=90
2x=90-34
2x=56
Divide both sides by 2
x=56/2
x=28
Question 9
3x+11+25+90=180
3x+126=180
3x=180-126
3x=54
Divide both sides by 3
x=54 ➗ 3
x=18
Question 10
5x+12=6x-10
Collect like terms
6x-5x=12+10
x=22
Question 11
45+3x=180
3x=180-45
3x=135
Divide both sides by 3
x=135 ➗ 3
x=45
Sounds as tho you meant:
4n = (2/7)(500)
1000
If that's the case, then 4n = ------------
7
1000 250
or n = ------------ = --------- (answer)
28 7
Check: does 4(250/7) equal (2/7)(500)? YES.
Ok sure!
first we have to find y
so...
lets start with the first one:
5x+y=2 (we cannot have two variables together so:
5x+y=2
-y =-y so.. now we have 5x= 2-y (but we must get y positive and by itself!)
-2 = -2
so: now you have
5x-2=-y but need a positive variable so multiply each side by a (-1)
(-1) 5x-2=-y (-1) So..
-5x +2 =y so now we know Y!
therefore whenever you see why in the next problem insert in its place: -5x +2
I hope it helps!! :)
Answer:
Step-by-step explanation:
x= the number
2x+4
3= x
2(3)+4=
6+4= 10
