1. 7r - 7 = 2r + 18
1 .r= -5****
2. r= 5
3. r= 2.2
4. r= 1.2
2. 2x + 12 = 18 - x
1. x= 3
2. x= 10
3. x= 6****
4. x= 2
3. 8x - 3 = 15x + 18
1. x = -3
2. x= 3****
3. x= 2.1
4. x= .9
4. 6y- 6 = 4y + 16
1. y = 2.2
2. y = -2.2
3. y= 11
4. y = 5****
Am i right?
well, let's check your answers...
7r - 7 = 2r + 18
7(-5) - 7 = 2(-5) + 18
-35-7 = -10+18
-42 = 8
Nope
2x + 12 = 18 - x
2(6)+12 = 18-6
12+12 = 12
24 = 12
Nope
8x - 3 = 15x + 18
8(3)-3 = 15(3)+18
24-3 = 45+18
21 = 63
Nope
6y- 6 = 4y + 16
6(5)-6 = 4(5)+16
30-6 = 20+16
24 = 36
Nope.
Clearly you are either guessing, or making some mistakes.
How did you arrive at your answers? Show some work for us to check.
ok like I said I tired then I gave up and yeah. can you plz help me understand this clearly. I new at this whole home school stuff and I never/ and I mean never and to do this and learn this by myself bc I had teachers to come and sit down to show me
and looking at what u typed up, how?
#1.
7r - 7 = 2r + 18
subtract 2r from both sides
5r - 7 = 18
add 7 to both sides
5r = 25
divide by 5
r = 5
#2.
2x + 12 = 18 - x
3x + 12 = 18
3x = 6
x = 2
#3.
8x - 3 = 15x + 18
-7x - 3 = 18
-7x = 21
x = -3
#4.
6y- 6 = 4y + 16
2y - 6 = 16
2y = 22
y = 11
To check if your answers are correct, we can solve each equation step by step. Let's go through them one by one:
1. 7r - 7 = 2r + 18
To solve for r, we need to isolate r on one side of the equation. We can start by moving all the terms containing r to one side and the constant terms to the other side:
7r - 2r = 18 + 7
5r = 25
Dividing both sides of the equation by 5:
r = 5
The correct answer is 5, not -5.
2. 2x + 12 = 18 - x
To solve for x, we want to isolate x on one side of the equation. Let's add x to both sides:
2x + x + 12 = 18
Combining like terms:
3x + 12 = 18
Subtracting 12 from both sides:
3x = 6
Dividing both sides by 3:
x = 2
The correct answer is 2, not 6.
3. 8x - 3 = 15x + 18
To solve for x, let's move all the terms containing x to one side and the constant terms to the other side:
8x - 15x = 18 + 3
-7x = 21
Dividing both sides by -7:
x = -3
The correct answer is -3, not 3.
4. 6y - 6 = 4y + 16
To solve for y, we want to isolate y on one side of the equation. Let's subtract 4y from both sides:
6y - 4y - 6 = 16
Combining like terms:
2y - 6 = 16
Adding 6 to both sides:
2y = 22
Dividing both sides by 2:
y = 11
The correct answer is 11, not 5.
Based on the corrections made, the correct answers are:
1. r = 5
2. x = 2
3. x = -3
4. y = 11