Step 1 : subtract 1 from both sides
Step 2 : Divide both sides by 3
Step 3 : Find the square root of 9
x= (-3,3)
remember negative × negative = positive
•<span>75% = 0.75
•</span><span>450 ÷ 0.75 = 600
•</span><span>450 is 75% 0f 600
There are the steps that I used to get that </span><span>450 is 75% 0f 600</span>
7*6*5*4*3*2*1 = 7! = 5040
1*6*5*4*3*2*1 = 6! = 720
1x - 1y + 2z = -3 → 1x - 1y + 2z = -3 → 2x - 2y + 4z = -6
2x + 2y - 1z = -3 → 2x + 2y - 1z = -3 → 2x + 2y - 1z = -3
3x + 2y + 0z = 8 4x + 3z = -9
1x - 1y + 2z = -3
2x + 2y - 1z = -3 → 2x + 2y - 1z = -3 → -2x - 2y + 1z = 3
3x + 2y + 0z = 8 → 3x + 2y + 0z = 8 → 3x + 2y + 0z = 8
x + z = 11
4x + 3z = -9 → 4x + 3z = -9
1x + 1z = 11 → 4x + 4z = 44
-z = -53
-1 -1
z = 53
x + z = 11
x + 53 = 11
- 53 - 53
x = -42
3x + 2y = 8
3(-42) + 2y = 8
-126 + 2y = 8
+ 126 + 126
2y = 134
2 2
y = 67
(x, y, z) = (-42, 67, 53)
The answer is B.