问题
解答题
39+2x=5x
2(13+x-25)÷3=18.
答案
(1)39+2x=5x,
39+2x-2x=5x-2x,
39÷3=3x÷3,
x=13;
(2)2(13+x-25)÷3=18,
2(x-12)÷3×3=18×3,
2(x-12)÷2=54÷2,
x-12+12=27+12,
x=39.
39+2x=5x
2(13+x-25)÷3=18.
(1)39+2x=5x,
39+2x-2x=5x-2x,
39÷3=3x÷3,
x=13;
(2)2(13+x-25)÷3=18,
2(x-12)÷3×3=18×3,
2(x-12)÷2=54÷2,
x-12+12=27+12,
x=39.