Question

584* a =584. a*5=690. 3*a=963. 958+a=1000. a+345=799. a-123=953

Answer 1

584*a=584 => a=584:584 => a=1
a*5=690 => a=690:5 => a=138
3*a=963 => a=963:3 => a=321
958+a=1000 => a=1000-958 => a=42
a+345=799 => a=799-345 => a=454
a-123=953 => a=953+123 => a=1076

Answer 2

a) 54*a=584
a=584:54
a= 10.814
b) a*5=690
a=690:5
a=138
c) 3*a=963
a=963:3
a=321
d) 958+a=1000
a=1000-958
a=42
e) a+345=799
a=799-345
a=454
f) a-123=953
a=953+123
a= 1076