18(x-2)=270 18x-36=270 18x-36+36=270+36 18x=306 18x÷18=306÷18 X=17 12x=300-4x 12x+4x=300-4x+4x 16x=300 16x÷16=300÷16 X=18.75 7x+5.3=7.4 7x+5.3-5.3=7.4-5.3 7x=2.1 7x÷7=2.1÷7 X=0.3