如题所述
第1个回答 2020-01-05
解:解方程, 此方程的解为x = 14
30 + 3.8x = 38.4 + 3.2x
30 + [(3×10+8)/10]x = (38×10+4)/10 + [(3×10+2)/10]x
30 + (38/10)x = 384/10 + ( 32/10)x
30 + (19/5)x = 192/5 + (16/5)x
(19/5)x - (16/5)x = 192/5 - 30
(3/5)x = 192/5 - 150/5
(3/5)x = 42/5
x = 42/5 ÷ 3/5
x = 42/5 × 5/3
∴x = 14
答:此方程的解为x = 14本回答被网友采纳
30 + 3.8x = 38.4 + 3.2x
30 + [(3×10+8)/10]x = (38×10+4)/10 + [(3×10+2)/10]x
30 + (38/10)x = 384/10 + ( 32/10)x
30 + (19/5)x = 192/5 + (16/5)x
(19/5)x - (16/5)x = 192/5 - 30
(3/5)x = 192/5 - 150/5
(3/5)x = 42/5
x = 42/5 ÷ 3/5
x = 42/5 × 5/3
∴x = 14
答:此方程的解为x = 14本回答被网友采纳
第2个回答 2020-01-05
30+3.8x=38.4+3.2x
解3.8x-3.2x=38.4-30
(3.8-3.2)x=8.4
x=8.4÷0.6
x=14
希望能帮到你!
解3.8x-3.2x=38.4-30
(3.8-3.2)x=8.4
x=8.4÷0.6
x=14
希望能帮到你!