48-3(x+5)=24 1230:3(x-20)=10
3(x+5)=48-24 3(x-20)=1203:10
3(x+5)=24 3(x-20)= 120,3
x+5=24:3 x-20=120,3:3
x+5=8 x-20=40,1
x=8-5 x=40,1+20
x=3 x=60,1
mk nghĩ thế
\(48-3\left(x+5\right)=24\)
\(-3\left(x+5\right)=48-24\)
\(-3x-15=24\)
\(-3x=24+15\)
\(-3x=39\)
\(x=-13\in N\)
\(1230:3\left(x-20\right)=10\)
\(410\left(x-20\right)=10\)
\(x-20=\frac{10}{410}\)
\(x-20=\frac{1}{41}\)
\(x=\frac{1}{41}+20\)
\(x=\frac{821}{41}\in N\)
ko bt có sai sót ko? ^ - ^ <k cho mik nhé>
48-3(x+5)=24
3(x+5)=48-24
(x+5)=24:3
x+5= 8
x=8-5
x=3
a) 48-3(x+5)=24
3(x+5)=48-24
3(x+5)=24
x+5=24:3
x+5=8
x=8-5
x=3
b) 1230:3(x-20)=10
3(x-20)=1230:10
3(x-20)=123
x-20=123:3
x-20=41
x=41+20
x=61
đúng lun ó