5✘+3.5=30怎么解方程?
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5.5✘+4.5✘=75怎么解方程?~
5x + 3.5 = 30
5x + (3×10+5)/10 = 30
5x + 35/10 = 30
5x + 7/2 = 30
5x = 30 - 7/2
5x = 60/2 - 7/2
5x = 53/2
x = 53/2 ÷ 5
x = 53/2 × 1/5
x = 53/10
∴x = 5.3
答:此方程的解为x = 53/10,【即x = 5.3】
先把3.5挪过去,两边都减去3.5.然后再做除法就解出来了
解:
5x+3.5=30
5x=30-3.5
5x=26.5
x=5.3
先把3.5挪去,两边都减去3.5,然后再做除法就解出来了
5✘+3.5=30怎么解方程?视频
相关评论:
5.5x+4.5x=10x
10x=75
x=7.5
解:合并同类项:2x=42
X=21
∴此方程解为:X=21
5x + 3.5 = 30
5x + (3×10+5)/10 = 30
5x + 35/10 = 30
5x + 7/2 = 30
5x = 30 - 7/2
5x = 60/2 - 7/2
5x = 53/2
x = 53/2 ÷ 5
x = 53/2 × 1/5
x = 53/10
∴x = 5.3
答:此方程的解为x = 53/10,【即x = 5.3】
先把3.5挪过去,两边都减去3.5.然后再做除法就解出来了
解:
5x+3.5=30
5x=30-3.5
5x=26.5
x=5.3
先把3.5挪去,两边都减去3.5,然后再做除法就解出来了
5✘+3.5=30怎么解方程?视频
相关评论: