[tex]a) \: 45 \times a + (4575 + 3975) \div 10 = \\ = 9855 \\ 45 \times a + 8550 \div 10 = 9855 \\ 45 \times a + 855 = 9855 \\ 45 \times a = 9855 - 855 \\ 45 \times a = 9000 \\ a = 9000 \div 45 \\ a = 200[/tex]
[tex]b)(100 \times b - 213) \times 55 = 4785 \\ 100 \times b - 213 = 4785 \div 55 \\ 100 \times b - 213 = 87 \\ 100 \times b = 87 + 213 \\ 100 \times b = 300 \\ b = 300 \div 100 \\ b = 3[/tex]
[tex]c)9144 - c \times 6 + (3600 \div 36 \times \\ \times 25) \div 25 = 6064 \\ 9144 - c \times 6 + (100 \times 25) \div 25 = \\ = 6064 \\ 9144 - c \times 6 + 2500 \div 25 = 6064 \\ 9144 - c \times 6 + 100 = 6064 \\ 9144 - c \times 6 = 6064 - 100 \\ 9144 - c \times 6 = 5964 \\ c \times 6 = 9144 - 5964 \\ c \times 6 = 3180 \\ c = 3180 \div 6 \\ c = 530[/tex]
[tex]d)1458 + 25 \times d - 8702 \div 19 = \\ = 10000 \\ 1458 + 25 \times d - 458 = 10000 \\ 1458 + 25 \times d = 10000 + 458 \\ 1458 + 25 \times d = 10458 \\ 25 \times d = 10458 - 1458 \\ 25 \times d = 9000 \\ d = 9000 \div 25 \\ d = 360[/tex]
[tex]e)e \div 15 + (1000 - 238 \div 14) \times 5 \\ = 5482 \\ e \div 15 + (1000 - 17) \times 5 = 5482 \\ e \div 15 + 983 \times 5 = 5482 \\ e \div 15 + 4915 = 5482 \\ e \div 15 = 5482 - 4915 \\ e \div 15 = 567 \\ e = 567 \times 15 \\ e = 8505[/tex]
<--:8505, 530, 360, 200, 3.
SUPER
