Question

calcule x,y e z tais que:
​

Answer 1

Explicação passo-a-passo:

• $\sf 2x-1=3$

$\sf 2x=3+1$

$\sf 2x=4$

$\sf x=\dfrac{4}{2}$

$\sf x=2$

• $\sf x-y-7=4$

$\sf 2-y-7=4$

$\sf y=2-7-4$

$\sf y=-9$

• $\sf z-7=2z$

$\sf 2z-z=-7$

$\sf z=-7$