Question

34-[6+(12×7-2×a+36)]:8=20

Answer 1

34-[6+(12•7-2•a+36)]:8=20 34-[6+(84-2•a+36)]:8=20 34-[6+(2•a+84-36)]:8=20 34-[6+(2•a+48)]:8=20 34-[6+(2•a+48)]=20•8 34-[6+(2•a+48)]=160 [6+(2•a+48)]=160+34 [6+(2•a+48)]=194 (2•a+48)=194-6 (2•a+48)=188 2•a=188-48 2•a=140 a=140:2 a=70