问题
解答题
求未知数x的解.
2x-12=4
12×6+8x=120.
答案
(1)2x-12=4,
2x-12+12=4+12,
2x÷2=16÷2,
x=8;
(2)12×6+8x=120,
72+8x=120,
72+8x-72=120-72,
8x=48,
x=6.
求未知数x的解.
2x-12=4
12×6+8x=120.
(1)2x-12=4,
2x-12+12=4+12,
2x÷2=16÷2,
x=8;
(2)12×6+8x=120,
72+8x=120,
72+8x-72=120-72,
8x=48,
x=6.