(1)6x-4x=26, 2x=26, 2x÷2=26÷2, x=13; (2)10.4x-5.4x=75, 5x=75, 5x÷5=75÷5, x=15; (3)18m+4m=88, 22m=88, 22m÷22=88÷22, m=4; (4)4y+y=17, 5y=17, 5y÷5=17÷5, y=3.4; (5)9a-6a=12.6, 3a=12.6, 3a÷3=12.6÷3, a=4.2; (6)y-0.36y=64, 0.64y=64, 0.64y÷0.64=64÷0.64, x=100. |