7a + 10 = 2a
7a = 2a -10
5a = -10
a = -2
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WOuldn't it be 4b-8
Ten times nine equals ninety.
Ten plus ten plus five equals twenty five dollars
Ten plus ten plus ten minus two hundred equals negative one hundred seventy.
9 plus 7 equals 144. The series is formed by multiplying the first number with the sum of both numbers. 2(2 + 3 ) = 10 : 7(7 + 2) = 63 : 6(6 + 5) = 66 : 8(8 + 4) = 96 : Then 9(9 + 7) = 144.