Question

7×+4-16+8-24+3×


15+3+2-10+2×=-20+5-30-3×


25+6-3+5×=-8+4-16+3×


16-2+21+2×=-3×+7-35-2×


20+4-6-5×=-9-18-8×-12

Answer 1

7×+4-16+8-24+3×=
7x+3x=-4+16-8
10x=16-12
10x=4
x=2 dividido por 5=0,4


15+3+2-10+2×=-20+5-30-3×
2x+3x=-20+5-30-15-3-2+10
5x=35-50
5x=-15
x= -3


25+6-3+5×=-8+4-16+3×
5x-3x= -8+4-16+6-3-25
2x=-52+10
2x= -42
x= -21


16-2+21+2×=-3×+7-35-2×
2x+3x+2x=7-35-16+2+21
7x=+30-51
7x=-21
x=-3

20+4-6-5×=-9-18-8×-12
-5x+8x=-9-18-12-20-4+6
3x=-63+6
3x=-57
x=-19