Question

1,64+x=7,9    2,706+x=7,407

Answer 1

1,64+x=7,9
x=7,9-1,64
x=6,26
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2,706+x=7,407
x=7,407-2,706
x=4,701

Answer 2

cgc

Answer 3

помогите 3*(1,5+х)=9,3