Пошаговое объяснение:
а) 4x + 4 = -12 в) 2(y + 3) = 21
4х=-12-4 2у+6=21
4х=-16 2у=21-6
х=-16/4 2у=15
х=-4 у=15/2
б) 7x - 6= x + 12 у=7,5
7х-х=12+6 г) 3(3х - 1) – х = 13.
6х=18 9х-3-х=13
х=18/6 8х=13+3
х=3 8х=16
х=16/8
х=2
2) |1.2-3x| - |y| = |1.2-3*0.2| - |-0.6| = |1.2-0.6| - 0.6 = 0.6 - 0.6 = 0
3) 2|x| + |1-3x| = 2|1.2| + |1-3*1.2| = 2*1.2 + |1-3.6| = 2.4 + |-2.6| = 2.4+2.6 = 5
4) |4-5x| - 3|x| = |4-5*1.7| - 3|1.7| = |4-8.5|-3*1.7 = |-4.5| - 5.1 = 4.5 - 5.1 = -0.6
5) 7|-x|-4|3y-3.4| = 7|2| - 4|3*0.8-3.4| = 7*2 - 4|2.4-3.4| = 14 - 4|-1| = 14 - 4 = 10
6)3|x-1|-2|3-y| = 3|0.7-1|-2|3-1.7| = 3|-0.3|-2|1.3| = 3*0.3-2*1.3 = 0.9 - 2.6 = -1.7
Пошаговое объяснение:
а) 4x + 4 = -12 в) 2(y + 3) = 21
4х=-12-4 2у+6=21
4х=-16 2у=21-6
х=-16/4 2у=15
х=-4 у=15/2
б) 7x - 6= x + 12 у=7,5
7х-х=12+6 г) 3(3х - 1) – х = 13.
6х=18 9х-3-х=13
х=18/6 8х=13+3
х=3 8х=16
х=16/8
х=2