Question

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Answer 1

$(26 + (x - 7) \times 12) \div 2 = 49$

$(26 + 12x - 84) \div 2 = 49$

$( - 58 + 12x) \div 2 = 49$

$\frac{ - 58 + 12x}{2} = 49$

$\frac{2( - 29 + 6x)}{2} = 49$

$- 29 + 6x = 49$

$6x = 49 + 29$

$6x = 78$

$x = 13$

Answer 2

Explicație pas cu pas:

[26+(×-7)*12]:2=49

(26+12×-84):2=49

(-58+12×):2=49

$\frac{ - 58 + 12x}{2} = 49$

$\frac{2( - 29 + 6x)}{2} = 49$

simplificam 2 cu 2

-29+6×=49

6×=49+29

6×=78

×=78:6

×=13