Respuesta:
Figura 1 :
2x + 60 = 140
x = 40
Figura 2 :
5x - 10 = 445/3 = 148.333
x = 190/6 = 31.667
Figura 3 :
8x + 20 = 148
2x = 32
Explicación paso a paso:
Figura 1 :
2x + 60 + x = 180
3x = 120
x = 40
Figura 2 :
5x - 10 + x = 180
6x = 190
x = 190/6
Figura 3 :
8x + 20 + 2x = 180
10x = 160
x = 16
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