Question

equaçao do primeiro grau x + 5=20-4x​

Answer 1

x + 5 = 20 - 4x

4x + x = 20 - 5

5x = 15

x = 15/5

x = 3

Answer 2

▶Calculando a equação ⤵

$\large \sf \: x + 5=20-4x \\ \\ \large \sf \: x + 4x = 20 - 5 \\ \\ \large \sf \: 5x = 15 \\ \\ \large \sf 15 \div 5 \\ \\ \large \Rightarrow \boxed{ \maltese\: \red x \red = \red3 \: \maltese}$

X = 3