Question

(15 - 4)+ 3-(12-5 x 2) – 9 ​

Answer 1

$(15 - 4) + 3 - (12 - 5x2) - 9 \\ (15 - 4) \\ 11 \\ \\ 11 + 3 - (12 - 5x2) - 9 \\ (12 - 5x2) \\ 5x \times 2 \\ (5 \times 2)x \\ 10x \\ \\ 11 + 3 - (12 - 10x) - 9 \\ 11 + 3 - 12 + 10x - 9 \\ (11 + 3) \\ 14 \\ \\ 14 - 12 + 10x - 9 \\ (12 + 9) \\ 21 \\ (14 - 21) \\ - 7 \\ \\ - 7 + 10x$

R/= $- 7 + 10x$