15) Hallar el valor de la incógnita: a) -4+x =12, b) 3.x=9, c) x -15=0, d) -2+x-(-3)= 7+2.3, e) 4.x + (-7) =5. doy corona
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Verified answer
-4 + x = 12
x = 12 + 4
x = 16
3x = 9
x = 9/3
x = 3
x - 15=0
x = 15
-2 - x - (-3) = 7 + 2.3
-2 - x + 3 = 7 + 6
+1 - x = 13
+1 - 13 = x
-12 = x
4.x + (-7) = 5
4x - 7 = 5
4x = 7 + 5
4x = 12
x = 12/4
x = 3
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