Question

co ai lam duoc cau lay ko

a /  5 .2^2 + ( x+ 3 ) = 5^2

b/  4 . ( x - 5 ) - 2^3 = 2^4 . 3

Answer 1

\(a,5.2^2+\left(x+3\right)=5^2\)

\(20+x+3=25\)

\(x=25-3-20\)

\(x=2\)

\(b,4.\left(x-5\right)-2^3=2^4.3\)

\(4.\left(x-5\right)-8=48\)

\(4.\left(x-5\right)=56\)

\(x-5=14\)

\(x=19\)

Answer 2

            Bài làm :

\(a\text{ )}5.2^2+\left(x+3\right)=5^2\)

\(\Leftrightarrow20+x+3=25\)

\(\Leftrightarrow x=25-23\)

\(\Leftrightarrow x=2\)

\(b\text{ )}4.\left(x-5\right)-2^3=2^4.3\)

\(\Leftrightarrow4.\left(x-5\right)-8=48\)

\(\Leftrightarrow4.\left(x-5\right)=56\)

\(\Leftrightarrow x-5=14\)

\(\Leftrightarrow x=19\)

Answer 3

a) \(5.2^2+\left(x+3\right)=5^2\)

\(\Leftrightarrow20+x+3=25\)

\(\Leftrightarrow x=2\)

b) \(4\left(x-5\right)-2^3=2^4.3\)

\(\Leftrightarrow4\left(x-5\right)-8=48\)

\(\Leftrightarrow4\left(x-5\right)=56\)

\(\Leftrightarrow x-5=14\)

\(\Leftrightarrow x=19\)