1)8(x-14)=56 2)(46-x)*19=418 3)9(143-13x)=234 4)17(5x-16)=238 - вопрос №6428682181456246194183914313234417516238514448 от aikosyatb 05.04.2020 01:38

Question

Математика: 1)8(x-14)=56 2)(46-x)*19=418 3)9(143-13x)=234 4)17(5x-16)=238 5)14+4x-48=240 6)25b-7b-9=279 7)16a-7a+96=222 8)20y+5y+y+19=227 9)9b+6b-15=615 10)2a+123a+97=472 11)17x-x+5x-19=170 12)73y-y-22y+40=190

aikosyatb · Answer

1) 8(х-14)=56, 8х-112=56, 8х=56+112, 8х=168, х=21. 2) (46-х)*19=418, 874-19х=418, -19х=418-874, -19х=-456, х=24. 3) 9(143-13х)=234, 1287-117х=234, -117х=234-1287, -117х=-1053, х=9. 4) 17(5х-16)=238, 85х-272=238, 85х=238+272, 85х=510, х=6. 5) 14+4х-48=240, 4х=240-14+48, 4х=274, х=68,5. 6) 25b-7b-9=279, 18b=288, b=16. 7) 16a-7a+96=222, 9a=126, a=14. 8) 20y+5y+y+19=227, 26y=208, y=8. 9) 9b+6b-15=615 15b=630, b=42. 10) 2a+123a+97=472, 125a=375, a=3. 11) 17x-x+5x-19=170, 21x=189, x=9. 12) 73y-y-22y+40=190,...