解方程. (1)4x+8=36 (2)x÷5.6=3 (3)3.6x-x=

解方程. (1)4x+8=36 (2)x÷5.6=3 (3)3.6x-x=9.75 (4)4(x-3)=23.2.
2025-06-26 11:04:13
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回答1:

(1)4x+8=36,
       4x+8-8=36-8,
           4x=28,
        4x÷4=28÷4,
            x=7;

(2)x÷5.6=3,
          x=3×5.6,
          x=16.8;

(3)3.6x-x=9.75,
       2.6x=9.75,
  2.6x÷2.6=9.75÷2.6,
          x=3.75;

(4)4(x-3)=23.2,
  4×(x-3)÷4=23.2÷4,
          x-3=5.8,
        x-3+3=5.8+3,
            x=8.8;