Step 1: Add -2b to both sides.
Step 2: Add -2a to both sides.
Step 3: Add 4 to both sides.
Step 4: Divide both sides by 4.
4b/4 = a+4/4
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Hope this helps.
Solve the equation for b, so you need to isolate/get "b" by itself on one side of the equation.
[you can solve this different ways]
6b + 2a - 4 = 2b + 3a First subtract 2b on both sides
4b + 2a - 4 = 3a Next subtract 2a on both sides
4b - 4 = a Then add 4 on both sides
4b = a + 4 Finally divide 4 on both sides