Solve the following equation
210-3a=4a
Solve for a
210 - 3a = 4a
Group our variables -3a and 4a subtract 4a from both sides
-3a + 210 - 4a = 4a - 4a
-7a + 210 = 0
Group our constants 210 and 0. subtract 210 from both sides
-7a + 210 - 210 = 0 - 210
-7a = -210
a = 30
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