Respuesta:
A. X=3
Explicación paso a paso:
3 ( 7(x+8) - 4(5-x) ) +15 = 222
3 ( 7(x+8) - 4(5-x) ) +15-15 = 222 -15
3 ( 7(x+8) - 4(5-x) ) = 207
7(x+8) - 4(5-x) = 69
7x +56 +4x -20 = 69
11x +36 = 69
11x = 33
x = 3
3 ( 7(3+8) - 4(5-3) ) +15 = 222
3 ( 7(11) - 4(2) ) +15 = 222
3 ( 77 - 8 ) +15 = 222
( 3 * 69 ) +15 = 222
207 +15 = 222
222=222
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Respuesta:
A. X=3
Explicación paso a paso:
3 ( 7(x+8) - 4(5-x) ) +15 = 222
3 ( 7(x+8) - 4(5-x) ) +15-15 = 222 -15
3 ( 7(x+8) - 4(5-x) ) = 207
7(x+8) - 4(5-x) = 69
7x +56 +4x -20 = 69
11x +36 = 69
11x = 33
x = 3
3 ( 7(3+8) - 4(5-3) ) +15 = 222
3 ( 7(11) - 4(2) ) +15 = 222
3 ( 77 - 8 ) +15 = 222
( 3 * 69 ) +15 = 222
207 +15 = 222
222=222