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Answer:
x=3
Step-by-step explanation:
let x represent the space provided
(4+7)×3=(4×3)+(7×x)
11×3=12+7x
33=12+7x
Group like terms
33-12=7x
21=7x
Divide both side by the co-efficient of x
21/7=7x/7
3=x
Therefore x=3