Question

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doy una corona

1)= 21 - ( 12 - X ) = 20
2)= X + 76 - 13 = 178
3)= 13 - X = 8
4)= 18 = 80 - X

Answer 1

1) x = 11

X = 20 + 12 = 32

X = 32 - 21 = 11

2) x = 115

X = 178 + 13 = 191

X = 191 - 76 = 115

3) x = 5

X = 13 - 8 = 5

4) x = 62

80 - 18 = 62