Question

[phạm ngọc diệp]

a/(x-15)x100=0             b/64x(x-10)=128              c/x-105:21=15          d/(x-105):21=15   

e/ 315+(125-x)=435    

Answer 1

[phạm ngọc diệp]

caau nayf laf caau tim x nha

Answer 2

[Trang]

\(a,\left(x-15\right)\times100=0\)

\(x-15=0\)

\(x=0+15\)

\(x=15\)

\(b,64\times\left(x-10\right)=128\)

\(x-10=128\div64\)

\(x-10=2\)

\(x=2+10\)

\(x=12\)

\(c,x-105\div21=15\)

\(x-5=15\)

\(x=15+5\)

\(x=20\)

\(d,\left(x-105\right)\div21=15\)

\(x-105=15\times21\)

\(x-105=315\)

\(x=315+105\)

\(x=420\)

\(d,315+\left(125-x\right)=435\)

\(125-x=435-315\)

\(125-x=120\)

\(x=125-120\)

\(x=5\)

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