Question

[(20+339÷3+a÷4)×7-5×400]÷3-22×3+125×8=1000

Answer 1

[(20+339÷3+a÷4)×7-5×400]÷3-22×3+125×8=1000

[(20+113+a÷4)×7-2000]÷3-66+1000=1000

[(133+a÷4)×7-2000]÷3-66=1000-1000

[(133+a÷4)×7-2000]÷3-66=0

[(133+a÷4)×7-2000]÷3=0+66

[(133+a÷4)×7-2000]÷3=66

(133+a÷4)×7-2000=66×3

(133+a÷4)×7-2000=198

(133+a÷4)×7=198+2000

(133+a÷4)×7=2198

133+a÷4=2198:7

133+a÷4=314

a÷4=314-133

a÷4=181

a=181×4

a=724

Answer 2

[(20+339:3+a:4)×7-5×400]:3-22×3+125×8=1000
[(20+113+a:4)×7-2000]:3-66+1000=1000
[(20+113+a:4)×7-2000]:3=1000+66-1000
[(20+113+a:4)×7-2000]:3=66
(20+113+a:4)×7-2000=66×3
(20+113+a:4)×7-2000=198
(20+113+a:4)×7=198+2000
(20+113+a:4)×7=2198
20+113+a:4=2198:7
20+113+a:4=314
a:4=314-20-113
a:4=181
a=181×4
a=724