Question

Rezolvati in multimea R ecuatiile: 5x+4=25-2x si 2z-4=8-z

Answer 1

$5x + 4 = 25 - 2x$

$5x + 2x = 25 - 4$

$7x = 21 \: | \div 7$

$x = 3 \: \in \: \mathbb{R}$

$2z - 4 = 8 - z$

$2z + z = 8 + 4$

$3z = 12 \: | \div 3$

$z = 4 \: \in \: \mathbb{R}$

Answer 2

5x+4=25-2x
5x-2x=25-4
3x=21
x=21/3
x=7

2z-4=8-z
2z+z=8+4
3z=12
z=12/3
z=4