解下面方程:2x+0.12×3=1 2×3.6+x=10 1.2x-0.6×0.8=5.52 7x-5×6=33 3.4×2+2x=20
问题描述:
解下面方程:2x+0.12×3=1 2×3.6+x=10 1.2x-0.6×0.8=5.52 7x-5×6=33 3.4×2+2x=20
答
2x+0.12×3=1
2x+0.36=1
2x=0.64
x=0.32
2×3.6+x=10
7.2+x=10
x=2.8
1.2x-0.6×0.8=5.52
1.2x-0.48=5.52
1.2x=6
x=5
7x-5×6=33
7x-30=33
7x=63
x=9
3.4×2+2x=20
6.8+2x=20
2x=13.2
x=6.6