Question

calcule ×:
5x-70° 2x+20°
mim ajudem

Answer 1

5x-70° e 2x+20°

5x - 7= 2x + 20

5x - 2x = 20 + 7

3x = 27

  x = 9°

Answer 2

5x-7=2x+20
5x-2x=20+7
3x=27
x=9 graus