Ответ:
1 a)4(×+3)=5. b)-2(×-5)+3(×-4)=4×+1
-2×+10+3×-12=4×+1
-2×+3×-4×=1-10+12
4×+12=5. -3×=3
4×=12-5. ×=1
4×=7
×=7/4
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Ответ:
1 a)4(×+3)=5. b)-2(×-5)+3(×-4)=4×+1
-2×+10+3×-12=4×+1
-2×+3×-4×=1-10+12
4×+12=5. -3×=3
4×=12-5. ×=1
4×=7
×=7/4
4x+12=5x-10
4x-5х=-10-12
-х=-22
Х=22