Respuesta:
R = 4
Explicación paso a paso:
3[x+5]+5[x+2]=57
3x + 15 + 5x + 10 = 57
3x + 5x + 15 + 10 = 57
8x + 25 = 57
8x = 57 -25
8x = 32
x = 32/8
x = 4
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Respuesta:
R = 4
Explicación paso a paso:
3[x+5]+5[x+2]=57
3x + 15 + 5x + 10 = 57
3x + 5x + 15 + 10 = 57
8x + 25 = 57
8x = 57 -25
8x = 32
x = 32/8
x = 4