Question

14. Calculați-l pe a: a + (202 x 4 - 234 x 2) = 902 (101 x 5 - 212 x 2) + a = 100 a - (234 x 2 + 202 x 2) = 49 (123 x 3 + 112 x 4) - a = 289​

Answer 1

Răspuns:

a + ( 202 × 4 - 234 × 2 ) = 902

a + ( 808 - 468 ) = 902

a + 340 = 902

a = 902 - 340

a = 562

( 101 × 5 - 212 × 2 ) + a = 100

( 505 - 424 ) + a = 100

81 + a = 100

a = 100 - 81

a = 19

a - ( 234 × 2 + 202 × 2) = 49

a - ( 468 + 404 ) = 49

a - 872 = 49

a = 49 + 872

a = 921

( 123 × 3 + 112 × 4 ) - a = 289

( 369 + 448 ) - a = 289

817 - a = 289

a = 817 - 289

a = 528