Toán Lớp 6: a) (9x-2³):5=2
b) [3⁴-(8²+14):14]x= 5³+10²
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Toán Lớp 6: a) (9x-2³):5=2
b) [3⁴-(8²+14):14]x= 5³+10²
Giúp với
Comments ( 2 )
9x-8=2.5
9x-8=10
9x=10+8
9x=18
x=18:9
x=2
b) [3^4-(8^2+14):14]x= 5^2+10^2
[81-(64+14):14]x=25+100
[81-78:14]x=125
[81-39/7]x=125
528/7x=125
x=125:528/7
x=875/526