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16-{3×167-2×[3+4×(5+X×7) -8]}÷9=1 cine e x? Dau Coroană

Răspuns :

16 - { 3 × 167 - 2 × [ 3 + 4 × ( 5 + X × 7 ) - 8 ] } : 9 = 1

16 - { 501 - 2 × [ 3 + 4 × ( 5 + X × 7 ) - 8 ] } : 9 = 1

{ 501 - 2 × [ 3 + 4 × ( 5 + X × 7 ) - 8 ] } : 9 = 16 - 1

{ 501 - 2 × [ 3 + 4 × ( 5 + X × 7 ) - 8 ] } : 9 = 15

501 - 2 × [ 3 + 4 × ( 5 + X × 7 ) - 8 ] = 15 × 9

501 - 2 × [ 3 + 4 × ( 5 + X × 7 ) - 8 ] = 135

2 × [ 3 + 4 × ( 5 + X × 7 ) - 8 ] = 501 - 135

2 × [ 3 + 4 × ( 5 + X × 7 ) - 8 ] = 366

3 + 4 × ( 5 + X × 7 ) - 8 = 366 : 2

3 + 4 × ( 5 + X × 7 ) - 8 = 183

3 + 4 × ( 5 + X × 7 ) = 183 + 8

3 + 4 × ( 5 + X × 7 ) = 191

4 × ( 5 + X × 7 ) = 191 - 3

4 × ( 5 + X × 7 ) = 188

5 + X × 7 = 188 : 4

5 + X × 7 = 47

X × 7 = 47 - 5

X × 7 = 42

X = 42 : 7

X = 6