Question

Ajudem Pf muita dificuldade

Answer 1

$A)\\\\2x+x+90^\circ= 180^\circ\\\\3x= 180-90\\\\x= \frac{90}{3}=30$

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$5x+10 + 4x -10 = 180\\\\9x=180\\\\x=20$

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$x-5+90+2x+5=180\\\\3x=180-90\\\\x=30$