Question

calcule a raiz ou solução das equações a 5x + 21 = 10 x 19 B 0,5 X + 2,6 = 5,1​

Answer 1

Calculado:

A)

$5x+21=10\cdot \:19\\\\5x+21=190\\\\5x+21-21=190-21\\\\5x=169\\\\\\\frac{5x}{5}=\frac{169}{5}\\\\x=\frac{169}{5}$

B)

$0.5x+2.6=5.1$

$0.5x\cdot \:10+2.6\cdot \:10=5.1\cdot \:10\\\\5x+26=51\\\\5x+26-26=51-26\\\\5x=25\\\\\frac{5x}{5}=\frac{25}{5}\\\\x=5$