0
3x + 8 = -7
Subtract '8' from both sides
3x - 9 + 8 = -8 -7
3x = -15
Divide both sides by '3'
3x/3 = -15/3
x = -5 The answer.
NB 'When saying/writing ' both sides' , remember the 'equals' sign . You MUST keep the equation 'equal/ balanced' like a pair of weigh scales.
So whatever you do to one side , in the way of '+, -, x, /.' you MUST do to the other
lenpollock
Wiki User
∙ 13y agoTo solve 3x + 9 = -7 for x, first subtract 9 from both left and right sides:
3x + 9 - 9 = -7 - 9, or
3x = -16.
Now, divide both sides by 3 to obtain x.
Add your answer:
Earn +20 pts
Find the solution 3x-3y equals 12 and 3x plus y equals 8?
70000000y=35t
How do you find the slope of 2x plus 3x plus 6 equals 0?
-2
3x plus 8 equals -7 find x?
3x + 8 = -7 Therefore, 3x = -15 x = -5
What is 3x plus 2 equals 3x plus 6?
3x + 2 = 3x + 6 This is not possible.
3x plus 2y equals 4 -3x plus 4y equals -10?
(2, -1)
Find the solution 3x-3y equals 12 and 3x plus y equals 8?
70000000y=35t
What is 3x plus 5y equals 16 plus -3x -6y equals -15?
no
How do you find the slope of 2x plus 3x plus 6 equals 0?
-2
3x plus 8 equals -7 find x?
3x + 8 = -7 Therefore, 3x = -15 x = -5
What is 3x plus 2 equals 3x plus 6?
3x + 2 = 3x + 6 This is not possible.
What is the answer to 3x plus 9?
3x plus 9 equals what?
3x plus 2y equals 4 -3x plus 4y equals -10?
(2, -1)
Are y equals -3x plus 2 and y plus 3x equals 4 parallel?
Their graphs are.
Find the missing number 3x equals 1.2 plus 1.2 plus 1.2?
3x=1.2+1.2+1.2 3x=3.6 3.6/3 x=1.2
What is the answer to 3x plus 2y - 5 equals 0 x equals y plus 10?
3x+2y-5=0 3x+2y=5 Im lost im only 12 work out the rest hope i helped
Find the value of x. X2 plus 1 equals 3x plus 11?
x=-11
Find the roots 2x equals 3x plus 1?
2x = 3x + 1; -x = 1; x = -1.
