Step-by-step explanation:
problem 1.
1. 6y = 30
2. y = 5
3. 3x + 2(5) = 16
4. 3x+10=16
5. 3x=6
6. x=2
solution: (2,5)
problem 2.
1. x=7
2. 4(2)-2y=18
3. 28-2y=18
4. -2y= -10
5. y=5
solution (7,5)
problem 3
10x=10
x=1
7(1) +y =-2
y=-9
(1,9)
problem 4
0= -6
no solution
problem 5
0=0
Infinite many
Make bottom number the same
it is 16
7/8 times 2/2=14/16
15/16+14/16+8/16=(15+14+8)/16=37/16=32/16+5/16=2+5/16=2 and 5/16 miles
Answer:
8/25
Step-by-step explanation:
Please kindly see the attached file for the explanation
Answer:
<h3>
The number is 7</h3>
Step-by-step explanation:
x - a certain number
6x - - six times the number
6x-31 - six times the number less 31
3x - three times the number
3x-10 - 10 subtracted from three times the number
so the equation:
6x - 31 = 3x - 10
+31 +31
6x = 3x + 21
-3x - 3x
3x = 21
÷3 ÷3
x = 7
Check: 6•7-31=42-31=<u>11</u>; 3•7-10=21-10=<u>11</u>
