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պարապմունք 21

94.
5a − (a + 1) = 4a-1
x − (6x − 5) = -5x+5
2a − (7a + 5) = -5a-5
7 − 4x + (2x − 1) = 6-2x
a + (a + 1) = 2a+1
(x − 1) + 6 = x+5
a + b + (a − b) = 2a
(x − y) + (x − y) = 2x-2y

95.
7a + (2a + 3b) = 9a+3b
9x + (2y − 5x) =4x+2y
(5x + 7a) + 4a = 5x+11a
(5x − 7a) + 5a = 5x-2a
(3x − 6y) − 4x = -x-6y
(2a + 5b) − 7b = 2a-2b
3m − (5n + 2m) = m-5n
6p − (5p − 3a) = p+3a

96.
3a և (a + 2b) = 4a+2b
7x և (2 – 3x) = 4x+2
(3-2a) և (-5a – 7) = -7a-4
(3x-y) և (-2x+4y) = x+3y

97.
(a + b) և 4a = -3a + b
6x և (4-7x) = 13x – 4
(4b + 2) և (5 − b) = 5b – 3
(2x – 7a) և (4a + x) = x – 3