Mathematics
emilyheberlie
2021-05-09 05:22:27
The sum of 9 times a number and - 9, added to 4 times a number
ANSWERS
Lhamilton
2021-05-09 05:33:02

Let the unknown number be xwe first form a suitable equation to help us solve this problem.9(x) + (- 9)  + 4(x) = ?we now expand the brackets, so:9x -9 + 4x = ?next, we put the coefficients and variables together.9x + 4x - 9 =  ?Next we isolate the coefficients and their variables from the other values.9x + 4x = 9so then13x = 9x = 9/13x = 0.69

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