Answer:
<em>b = 28</em>
Step-by-step explanation:
b + 28 = 2b
28 = 2b - b
28 = b
b = 28
Answer:
7
Step-by-step explanation:
let the no. be 'x'
By question,
2x-8=6
or, 2x =6+8
or,2x = 14
or,x = 7
therefore, the no. is 7.
Answer:
y=-3x+8
Step-by-step explanation:
y=mx+5, m=-3, x=1, y=5
5=(-3)(1)+b
5=-3+b
8=b
Answer:
x = 1
y = 10
Step-by-step explanation:
5x + y = 15
Step 1: Move 5x on the other side by subtracting it from both sides
y = 15 - 5x
2x + y = 12
Step 2: Move 2x on the other side by subtracting it from both sides
y = 12 - 2x
Since y = y, that means 15 - 5x = 12 - 2x
Step 3: Add 5x to both sides
15 = 12 + 3x
Step 4: Subtract 12 from both sides
3 = 3x
Step 5: Divide both sides by 3
x = 1
y = 12 - 2x
Step 6: Plug in 1 for x
y = 12 - 2(1)
Step 7: Multiply 2 by 1
y = 12 - 2
Step 8: Subtract 2 from 12
y = 10
Let x = the smaller number
Let 2x + 7 = the larger number
x + 2x + 7 = 25
3x = 18
x = 6
2x + 7 = 2(6) + 7 = 19