Toán Lớp 6: Tìm x biết:
a, 8+ x/ 9= 2/3 +3
b, 50% x X +16,8=9,4 x 2
giúp mk vs tí nx mjk pk nộp r nhanh vfa đúng vote 5s và ctrl hn ạ
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Toán Lớp 6: Tìm x biết:
a, 8+ x/ 9= 2/3 +3
b, 50% x X +16,8=9,4 x 2
giúp mk vs tí nx mjk pk nộp r nhanh vfa đúng vote 5s và ctrl hn ạ
Comments ( 2 )
a)
(8+x)/9=2/3+3
=>(8+x)/9=2/3+9/3
=>(8+x)/9=11/3
=>(8+x)xx3=9xx11
=>24+x xx3=99
=>x xx3=99-24
=>x xx3=75
=>x=75:3
=>x=25
Vậy x=25
b)
50%xx x+16,8=9,4xx2
=50/100 xx x+16,8=18,8
=>1/2xx x=18,8-16,8
=>1/2xx x=2
=>x=2:1/2
=>x=2xx2
=>x=4
Vậy x=4
1/2×x+16,8=18,8
1/2×x=2
x=2:1/2
x=4