c) \(x:15+42=15+26.8\)
= \(x:15=181\)
= \(x=181.15=2715\)
d) \(\left(x+40\right).15=75.24\)
= \(x+40=\frac{75.24}{15}=120\)
= \(x=120-40=80\)
C, x : 15 + 42 = 15 + 26 x 8
=>x : 15 + 42 = 15 + 208
=>x : 15 + 42 = 223
=>x : 15 = 223 - 42
=>x : 15 = 181
=>x = 181 x 15
=>x = 2715
Vậy x = 2715
c)x : 15+42=15+26 \(\times\) 8 d)(x+40)\(\times\)15=75\(\times\)24
x : 15+42=223 (x+40)\(\times\)15=1800
x : 15=223-42 x+40=1800\(\div\)15
x : 15=181 x+40=120
x =181 \(\times\)15 x=120\(-\)40
x=2715 x=80
c, x:15+42=15+26x8
x:15+42=15+208
x:15+42=223
x:15=223 - 42
x: 15=181
x=181x15
x=2715
d, (x+40) x 15 = 75 x 24
(x+40) x 15 = 1800
x + 40 = 1800 : 15
x + 40 = 120
x = 120 - 40
x = 80