Question

X + X x 2,7 + X x 6,3 = 120

Answer 1

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X x X ( 1 + 2,7 +  6,3) = 120 
Xx = 10 = 120
X = 10

Answer 2

Xx ( 1+2,7+6,3)=120

Xx 10= 120

X = 120 : 10 = 12

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Answer 3

X x ( 1+2,7+6,3)=120

X x 10= 120

X = 120 : 10

X = 12