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7-10+8x=23-4-14x
8x+14x=23-7+10
22x=26
x=1,(18)
7- (10-8x)=23 - (4+14x)
7-10+8x = 23-4-14x
-3+8x=19-14x /+3
8x=22-14x /+14x
22x=22 /:22
x=1
Sprawdzenie:
7- (10-8x)=23 - (4+14x)
7 - (10-8) = 23 - (4 + 14)
7-2 = 23 - 18
5 = 5
c)
(17x+22) - (5x+9) = (11x+15) -(22-21x)
17x +22 - 5x - 9 = 11x+155-22+21x
12x + 13 = 32x + 133 /-32x
-20x+13 = 133 /-13
-20x = 120 /:(-20)
x= -6
d)
(42x+37)-(26-34x) = 26x+211
42x+37-26+34x = 26x+211
76x+11 = 26x+211 /-26x
50x+11 = 211 /-11
50x = 200 /:50
x= 4