1) x+147=231
x=231-147
x=84
2) x-4523=2354
x=2354+4523
x=6877
3) 879-(458+x)=231
879 – 458 – x = 231
– x = 231 + 458 – 879
-x = -190
x = 190
4) 549-(425-y)=488
549 – 425 + y = 488
y = 488 + 425 – 549
y = 364
5) (x-96)-48=21
x – 96 – 48 = 21
x = 21 + 48 + 96
x = 165
1) x+147=231
x=231-147
x=84
2) x-4523=2354
x=2354+4523
x=6877
3) 879-(458+x)=231
879 – 458 – x = 231
– x = 231 + 458 – 879
-x = -190
x = 190
4) 549-(425-y)=488
549 – 425 + y = 488
y = 488 + 425 – 549
y = 364
5) (x-96)-48=21
x – 96 – 48 = 21
x = 21 + 48 + 96
x = 165