91. Решите уравнение: 1) (1,34 + x) - 58,3 = 4,26; 2) (94,2 - a) - 1,26 = 3,254; 3) 4,75 - (x - 0,67) = 3,025; 4) 40,3 - (63,4 - a) = 36,62.

**Решение:** 1) \[(1,34 + x) - 58,3 = 4,26\] \[1,34 + x = 4,26 + 58,3\] \[1,34 + x = 62,56\] \[x = 62,56 - 1,34\] \[x = 61,22\] 2) \[(94,2 - a) - 1,26 = 3,254\] \[94,2 - a = 3,254 + 1,26\] \[94,2 - a = 4,514\] \[a = 94,2 - 4,514\] \[a = 89,686\] 3) \[4,75 - (x - 0,67) = 3,025\] \[x - 0,67 = 4,75 - 3,025\] \[x - 0,67 = 1,725\] \[x = 1,725 + 0,67\] \[x = 2,395\] 4) \[40,3 - (63,4 - a) = 36,62\] \[63,4 - a = 40,3 - 36,62\] \[63,4 - a = 3,68\] \[a = 63,4 - 3,68\] \[a = 59,72\] **Ответы:** 1) x = 61,22 2) a = 89,686 3) x = 2,395 4) a = 59,72