Answer:
x=2
Step-by-step explanation:
So 9x+3=-7+7x+14
Subtract 3: 9x=4+7x
Subtract 7x: 2x=4
x=2
Answer:
9.5 < x < 15
Step-by-step explanation:
Get y in terms of x then substitute the expression into the other equation.
#7.
y - 2x = -6
y = 2x -6
y gets substituted for 2x - 6
5x - (2x - 6) = 9
5x - 2x + 6 = 9
3x + 6 = 9
3x = 9 - 6
3x = 3
x = 1
use this to find the other one
y - 2(1) = -6
y - 2 = -6
y = 2 - 6
y = -4
#8.
3y + x = 2
x = 2 - 3y
substitute x for 2 - 3y in the second equation
y - (2 - 3y) = -6
y - 2 + 3y = -6
4y - 2 = -6
4y = 2 - 6
4y = -4
y = -1
use this to find the other one
-1 - x = -6
-x = 1 - 6
-x = -5
x = 5
Answer:
x = 9.6 in
Step-by-step explanation:
The scale factor is 8:10 (difference in length.) This is simplified down to 4:5.
Method 1 (easier):
4/5 × 12 = 9.6 in.
Method 2 (harder but more comprehensive):
<em>cross-multiply</em>
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