<PRE><B>Question 668821</B>
1.  Solve for b
3b - 8 = 10 + (4-8b)
Isolate b
3b + 8b = 10 + 4 + 8
11b = 22
{{{highlight_green(b = 2)}}}
...
2. Solve for x
x-3(1-x)=47-x
Distribute the -3
x - 3 + 3x = 47 - x
Isolate x
x + 3x + x = 47 + 3
5x = 50
{{{highlight_green(x = 10)}}}
...
3.  x = 1+2y; 3x=5y+10
3(1+2y) = 5y + 10
3 + 6y = 5y + 10
6y - 5y = 10 - 3
{{{highlight_green(y = 7)}}}
x=1+2(7) = {{{highlight_green(x = 15)}}}
...
4. x = 20+y; x+y=70
20+y +y = 70
2y = 50
{{{highlight_green(y = 25)}}} last month
x = 20+25 = {{{highlight_green(x=45)}}} this month
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