Question

66-3.(x-2)=51

4x-20=2\(^{15}\):2\(^{12}\)

giúp mình nha

Answer 1

\(66-3\left(x-2\right)=51\)

\(3\left(x-2\right)=66-51\)

\(3\left(x-2\right)=15\)

\(x-2=5\)

\(x=7\)

Answer 2

a.

\(66-3\times\left(x-2\right)=51\)

\(3\times\left(x-2\right)=66-51\)

\(3\times\left(x-2\right)=15\)

\(x-2=\frac{15}{3}\)

\(x-2=5\)

\(x=5+2\)

\(x=7\)

b.

\(4x-20=2^{15}\div2^{12}\)

\(4x-20=2^3\)

\(4x-20=8\)

\(4x=8+20\)

\(4x=28\)

\(x=\frac{28}{4}\)

\(x=7\)

Chúc bạn học tốt

Answer 3

\(4x-20=2^{15}:2^{12}\)

\(4x-20=2^3\)

\(4x=28\)

\(x=7\)