First, turn both expressions into an equation 6a-4=<span>2a+<span>56 </span></span>--------------- Now solve Subtract 2a from each side <span><span>6a-4-</span>2a</span>=<span><span>2a+56-</span><span>2a </span></span>4a-4=<span>56 </span>---------------------- Add 4 to each side <span><span>4a-4</span>+4</span>=<span>56+4 </span><span>4a</span>=<span>60 </span>--------------------------- Divide each side by 4 4a ÷ 4 = 60 ÷ 4 a = 15
