Question

5 - 4x = 21

1/4x +1/8=1/3

Answer 1

\(5-4x=21\)

\(4x=5-21\)

\(4x=-16\)

\(x=\left(-16\right):4\)

\(x=-4\)

Answer 2

\(\frac{1}{4}x+\frac{1}{8}=\frac{1}{3}\)

\(\frac{1}{4}x=\frac{1}{3}-\frac{1}{8}\)

\(\frac{1}{4}x=\frac{5}{24}\)

\(x=\frac{5}{24}:\frac{1}{4}\)

\(x=\frac{5}{6}\)

Answer 3

Trả lời:

1/ 5-4.x=21

4.x=5-21

4.x=-16

x=-16:4

x=-4

Vạy x=-4

Answer 4

2/ \(\frac{1}{4}.x+\frac{1}{8}=\frac{1}{3}\)

\(\frac{1}{4}.x=\frac{1}{3}-\frac{1}{8}\)

\(\frac{1}{4}.x=\frac{5}{24}\)

\(x=\frac{5}{24}:\frac{1}{4}\)

\(x=\frac{5}{6}\)

Vậy x=\(\frac{5}{6}\)